12 × ( 80 ) ( 320 ) ÷ ( 1 1 )

(960) ( 165438+320 in 0)

Comprehensive formula: comprehensive formula:

12×(25+55)= 960(450- 130)÷(36+7.4)= 165438+320 in 0。

The second question is whether you have copied the wrong number, so you can only write the score.

First, calculate the following questions.

1、475+254+36 1 2、6 15+475+ 125 3、860- 168+ 159

4、465+358-27 5、647-(85+265) 6、476+(65-29)

7、 154×8÷ 16 8、400÷25×75 9、 16×25÷ 16×25

10、552÷69×8 1 1、600- 120÷ 10 12、(600- 120)÷ 10

13、(466-25×4)÷6 14、(43+32)÷(357-352)

15、 138+(27+48)÷25 16、56× 19+25×8

Second, use a simple method to calculate.

1、368+2649+ 135 1 2、 89+ 10 1+ 1 1 1

3、24+ 127+476+573 4、400-273- 127

5、327+(96- 127) 6、72×98

7、442- 103- 142 8、999+99+9

9、67×5×2 10、25×(78×4)

1 1、72× 125 12、9000÷ 125÷8

13、400÷25 14、25×36

15、 103×27 16、76× 102

17、3600÷25÷4 18、99×35

19、(25+ 12)×4 20、56×27+27×44

2 1、56×99+56 22、 125×25×8×4

23、25×32× 125 24、 125×64

Math calculation exercises in the second volume of Grade Four are 99× 85+85 5.63+8.8+4.37+1.236×19-9× 36 55×10/.

2.38-2.4+3.62 125×24 75×55+75×45 27.5-6.8-3.2

55.83-(3.2+5.83) 29× 125×8 5600÷25÷4 250÷8×4

58+( 124-24×3) 32.3-(5.02+2.03× 10) 32× 18+(32.6+ 18.09)

The fourth grade mathematics calculation problem is the first volume. Oral calculation questions (8 points for each small question *** 24 points)

1.36×5= 6×70=

40×80= 190×7=

2.99÷33= 760÷38=

15000÷500= 3800÷200=

3.8×250= 705×30=

900÷ 15= 750÷250=

Third, simple calculation (4 points for each small question *** 20 points)

1.7200÷45÷2

2. 125×24=

3.540÷27=

4.420÷35=

5.675÷25

Second, the oral problem (4 points for each small question *** 12 points)

1.750+250= 630-360=

1500+2000= 256+99=

22,600+140,000 = 1.84 million-620,000 =

937+ 1050= 4000- 1800=

3. 1000-420= 700- 198=

6300+270= 3800-600=

Three. Calculation problem (1-3 3 points, 4-7 5 points, *** 29 points)

1. Unknown x found.

x-936= 1844

2. find the unknown number X.

x+654= 1080

3. find the unknown number X.

495-x=278

4.50 1 12-3 1596=

5.5783+64548=

6.80706+ 1380+5434

7.94540-35894+8075

A primary school planted 585 trees in the third, fourth and fifth grades. The number of plants in grade 4 is 0/5 of that in grade 65438+5, and that in grade 3 is 3/4 of that in grade 5. How many trees are there in grade three? 2. The number of rainy days in July is 8/ 1 1 less than that in sunny days, and the number of cloudy days is 3/22 of that in sunny days. How many rainy days are there this month? 3. Grade 5 students in a school 152 students. Boys' 65,438+0/65,438+065,438+0 were selected to take part in the math contest with five girls, and the remaining students were just equal. How many boys and girls are there in this class? There are two 44m long iron wires. If the first one is cut 1/5 and the second one is connected 2.8m, then the two lines are equal. How long are these two wires?

Answer: Grade 3 is 3/4*300=225, Grade 4 is 300* 1/5=60, and Grade 5 is 300.

If someone rides a bike from home to the train station, if they drive at the speed of15km per hour, they can arrive15min earlier than the train departure time. If he drives at 9 kilometers per hour, he will arrive 15 minutes later than the departure time. Now he plans to arrive 10 minutes earlier than the departure time. How many kilometers should he drive every hour?

Answer: The distance between the two places is:15 * [1-15/60] =11. 25 kilometers

Then arrive 10 minutes in advance, and one hour should be enough: 1 1. 25/[ 1- 10/60]= 13。 5 km

The canteen buys flour and rice, which is twice as heavy as rice. It eats/kloc-0.5 kg of rice and 20 kg of flour every day. A few days later, all the rice was eaten, leaving 80 kilograms of flour. How many Jin of rice and flour does this canteen buy?

Solution: If the rice is x Jin and the flour is 2X Jin, then the time is X/ 15 days, so there is 20*(X/ 15)+80=2X, and the solution is X= 120. So rice is 120 Jin, and flour is 240 Jin.

The following one is easier.

1:A train travels 10 hour, B train travels for 7 hours, and A train travels 276 kilometers more than B. If the two trains have the same speed, find the speed of the two trains.

Chen and Zhang ride bicycles from the same place in opposite directions at the same time. After 0.5 hours, the distance is 12.5 kilometers. Chen's speed is 12 kilometers per hour. How many kilometers is Zhang's speed? (party)

3. The number of bookcases sold by the furniture factory is one fifth of that of five X cabinets, and the number of bookcases sold is less than that of five X cabinets 120. How many bookcases and five X cabinets were sold? (party)

4. Make a rectangular iron suitcase with a capacity of 60 square decimeters. The length of the bottom is 4 decimeters, the width is 3 decimeters, and what is the height? (party)

5. The master processed 80 parts, which was less than the two companions processed by the apprentice 10. How much has the apprentice processed? (party)

6. The apprentice processed 45 parts, 5 more than half of the master. How much did the master process? (party)

Answer:

1.A X B Y

10X-7Y=267

10/X+7/Y= 1

2. Zhang x

( 12+X)*0.5= 12.5

3. Bookshelf x five cabinets y

X= one fifth *Y

X=Y- 120

4. high x

4*3*X=60

5. Apprentice X

2X- 10=80

6. main x

Half *X+5=45

1, 25 divided by 2 times of a number, the quotient is 3 remainder 1, find this number. [4]

2. The green area of the school this year is 1.800 square meters, 40 square meters more than last year. What was the area of green space last year? [3]

This washing machine factory produces 260 washing machines every day this year, which is 40 less than the average daily output last year. How many washing machines did it produce every day last year? [3]

4. The chemical fertilizer factory transported 47 tons of chemical fertilizer with two cars, eight times with big cars and six times with small cars. The cart transports 4 tons at a time, and the car transports how many tons at a time? [3]

5. A piece of cloth is 36 meters long, and 10 adult clothes and 8 children's clothes are cut, each adult clothes is 2.4 meters long and each children's clothes is 2 meters long.

6. Car A travels 48 kilometers per hour and car B travels 56 kilometers per hour. The two cars walked back to each other at the same time from two places at a distance of 12 km. A few hours later, the distance between the two cars was 272 kilometers. [4]

7. There are 4,800 chickens in the farm * * *, and there are 300 hens more than cocks, which is 1.5 times. How many cocks and hens are there?

8. The elder brother and younger brother add up to 35 years old. My brother is three years older than my brother. How old are brother and younger brother? [4]

9. Two cars, A and B, drove in opposite directions from two places 528 kilometers apart at the same time, and met six hours later. Car A is 6 kilometers faster than car B every hour. How many kilometers do they drive per hour?

10, Xiao Zhang used to go to 7.4 yuan to buy apples, and used 2 Jin more oranges from 0.6 yuan. How much are oranges per kilogram? [4]

1 1. The school library buys more literary books than scientific books 156, and the number of literary books is three times that of scientific books. 12. How many literature books and science books did you buy? [4]

12. The book collection of Party A is three times that of Party B, with an average of 82 books per person. How many books does each of them have? [4]

13, a two-story bookshelf, the number of books in the upper layer is three times that in the lower layer. If you move 60 books from upstairs to downstairs, there are as many books on the two floors. Find out how many books are upstairs and downstairs. [4]

14. There are two goldfish tanks A and B, and the number of goldfish in cylinder A is half of that in cylinder B. For example, nine goldfish are taken from cylinder B and put into cylinder A, and the number of fish in the two cylinders is equal. How many goldfish are there in cylinder A? [4]

15. When the car goes from A to B, the speed is 60 kilometers per hour, which is ahead of schedule 1 hour; When I return, I will drive at a speed of 40 kilometers per hour, which is later than the planned time 1 hour. Find out the distance between Party A and Party B [5]

16. Students grow sunflowers. The number of trees planted in the fifth grade is three times less than that in the fourth grade, 10. There are more kinds in the fifth grade than in the fourth grade. How many trees are there in each grade?

17, TV factory produces a batch of TV sets. If it produces 40 TV sets a day, it will take 6 days longer than originally planned. If it produces 60 TV sets a day, it can be completed four days ahead of schedule. Find the original planned production time and the total number of TVs in this batch. [5]

19, a ruler and a knife * * 1.9 yuan, four rulers and six knives ***9 yuan, how much is each ruler and a knife?

20. Two granaries, A and B, have the same amount of grain. 130 tons is shipped from warehouse a, and after 230 tons is shipped from warehouse b, the surplus grain of warehouse a is three times that of warehouse b, and how many tons are stored in each granary?

2 1, coal piles a and b * * *100t. If 10 ton is transported from pile A to pile B, the quality of coal in pile A is exactly 1.5 times that of pile B. How many tons are there in reactor A and reactor B?

22. After warehouse A stores 32 tons of grain and warehouse B stores 57 tons of grain, warehouse A stores 4 tons and warehouse B stores 9 tons every day. A few days later, warehouse B stored twice as much grain as warehouse A?

23. These two wires are the same length. After cutting the first wire by 2 meters, the length of the second wire is 1.8 times of that of the first wire. How long are the original two lines? [4]

24, a batch of bananas, sold out 140 kg, the original quality of bananas is just five times that of the remaining bananas. How many kilograms are there in this batch of bananas?

25. Xiaoming went to climb the mountain. It took him 45 minutes to climb the mountain and 30 minutes to descend it by the same route. Every minute he goes up the mountain, he walks 9 meters less than every minute he goes down the mountain, so as to find the speed of going down the mountain. [4]

26. Party A and Party B drive in the same direction from Party A and Party B, with a distance of 18km respectively, with Party A behind. When Party A catches up with Party B, it travels 1.5h, and Party B travels 48km to find the speed of Party A [4].

27. Two cars, A and B, travel from A to B at the same time. Car A travels 30 kilometers per hour, while car B travels 45 kilometers per hour. Car B leaves two hours before car A, and both cars arrive at B at the same time. Find the distance between a and b.

28. Both the master and the apprentice process the same parts. Apprentices process 12 pieces per hour. After working for 3 hours, the master began to work. Six hours later, the two men processed the same number of parts. How many parts does the main module process per hour? [5]

29. There are two barrels of oil, A and B. After injecting 15 liter of oil into one barrel, the quality of the two barrels of oil is equal; If barrel B is filled with 145 liters, and the mass of barrel B is three times that of barrel A, how many liters are there in the original two barrels? [5]

30. The three railways A, B and C are * *119/km long. The length of railway A is twice that of railway B, which is 189km, and railway B is 8km less than railway C.. [5]

3 1, an engineering team consists of 6 rough carpenters and 1 joiners. After completing a certain task, each roughneck gets a 200 yuan, and the salary of each joiner is 30 yuan more than the average salary of the team. How much does each participant get? [5]

32. Xiaoming scored an average of 96 points in Chinese, mathematics and geography in the senior high school entrance examination, and his common sense score was 3 points less than that in Chinese, mathematics, geography and common sense.

The TV factory plans to assemble a batch of TV sets in 25 days. If you install 35 TV sets every day, you can overfulfil 60 TV sets in 24 days. Find out how many TV sets were originally planned to be assembled every day.

34. Both the master and the apprentice have to process the same number of parts. The master processes 50 parts per hour, more than the apprentice 10. During the work, the master stopped working for 5 hours, so the apprentice finished the task 1 hour earlier than the master. How many parts can each of them process? [5]

35. It takes 13.6 yuan to buy 2.5 kilograms of apples and 2 kilograms of oranges. As we all know, a kilogram of apples is more expensive than a kilogram of oranges. What is the unit price of these two fruits? [5]

36.24 yuan for 4 pens and 9 ballpoint pens. It is known that the money for buying two pens can buy three ballpoint pens. How much are these two pens? [4]

37. For a two-digit number, the number in the first place is twice that in the tenth place. If the number on the tenth digit is reversed from the number on the second digit, the new two digits will be larger than the original two digits. 36. Find the original two digits. [5]

38, a two-digit number, the number on the decimal digit is less than the number on the single digit 1, and the sum of the number on the decimal digit and the number on the single digit is 0.2 times that of this two-digit number. Find this two-digit number. [5]

39. There are four boxes with 45 balls in them. If there is any change, subtract 2 from the first box. Add 2 to the second box; Double the third box; If the fourth box is reduced by half, there will be as many balls in these four boxes. How many balls are there in each box? [5]

40. There are 72 long ropes and short ropes in the school gymnasium, and the number of short ropes is eight times that of long ropes. How many long and short ropes are there?

4 1, Aunt Wang sold eggs, and she sold 12 kg in the morning and 18 kg in the afternoon, which was 27.6 yuan more than that in the morning. How much is the average egg per kilogram?

42. The railway length from Nanjing to Beijing is 1 166 km. An express train goes from Nanjing to Beijing, while a local train goes from Beijing to Nanjing. Five and a half hours later, two trains met. Speed of the express train118km, and how many kilometers is the local train? (two methods)

43. The triangle has an area of 2. 1 m2 and a height of1.2m. How many meters is its base?

44. It took 15 days for the master and the apprentice to process a batch of parts together. The master processes 60 parts every day, and finishes the task by processing 360 more parts than the apprentice. How many parts does the apprentice process every day?

45. The canteen bought 7 bags of rice and 7 bags of flour, each with 525 kilograms. Each bag of rice weighs 50 kilograms, and each bag of flour weighs how many kilograms?

46. The toy factory produces 360 more panda toys than bear toys in a week, and the number of panda toys is five times that of bear toys. How many pieces of panda toys and bear toys have been produced respectively?

47. Li Shifu bought four pairs of socks and two pairs of shoes, which cost 95.2 yuan. It is known that each pair of shoes is 34 yuan and how much is each pair of socks?

48. The distance between Station A and bilibili is 900 kilometers. A truck and a bus leave from Station A and bilibili respectively at the same time. The speed of trucks is 80 kilometers per hour, and the speed of passenger cars is 120 kilometers per hour. How many hours did two cars meet on the road? (Do it in two ways)

49. The fruit shop delivered 30 boxes of apples and 25 boxes of pears, weighing 975 kilograms. Each box of apples weighs 20 kilograms, and each box of pears weighs how many kilograms?

50. The area of a trapezoid is 72.9 square centimeters, the upper bottom is 10.4 centimeters, the lower bottom is 5.8 centimeters, and how many centimeters is the height?

5 1, Xiaoming and Xiaojun went to buy greeting cards. Xiaojun bought 2.5 times as many cards as Xiaoming. Xiao Ming bought 15 again, and now the two quantities are equal. How many tickets did they each buy?

52. Two engineering teams jointly built an expressway with a length of 148km, which was just completed in 100 day. Team a repairs 0.76 kilometers every day, and how many kilometers does team b repair every day?

Math Problems in Grade Four/KOOC-0/00 Volume/KOOC-0/) 500+(407+0) = 2) 386+382+/KOOC-0//KOOC-0/4 =

3) 42+(9 1+ 158+ 109)= 4) (87+ 103+ 1 13)+97=

5) (246+387+ 154)+ 13= 6) 49+(7 1+ 15 1+ 129)=

7) 255+(79+45)= 8) ( 169+39+ 13 1)+26 1=

9) 2 19+ 175+ 18 1+225= 10) 14+498+486=

1 1) (404+ 195+96)+305= 12) 793+393=

13) ( 106+45+94)+ 155= 14) 433+(477+67)+23=

15) 25+(25 1+275+49)= 16) 5 1+(5+49)=

17) (83+33+ 17)+67= 18) 196+97=

19) 4 1+(33+59)= 20) 290+ 17 1+2 10+329=

2 1) 1000+499= 22) 226+( 166+74)=

Sadasdasd, fourth grade math book 2.

If you just search for the next simple math problem in the fourth grade online, there is a problem.

.................. 1475-(362+457)

= 1457-362-457

= 1475-475-362

= 1000-362

=638 mace is afraid of injury.

The fourth grade of primary school, the first volume of mathematical calculation problems, class name scores.

Fill in the blanks. (22 points)

The smallest natural number is (). The largest six digits is ()

(2) The number consisting of three billions, eight thousands and five ones is (), which is pronounced as ().

③ The highest digit of a number is tens of billions, which is () digit, and the highest digit of nine digits is () digit.

(4) The measured number and () are usually called nominal numbers.

⑤ Because △ ⊙□ = ○ ,□ = (), △ = ()

⑥ There are () days in February in leap year and () days in normal year.

⑦8003 square decimeter = () square meter () cubic decimeter

5 10 minute () 2005 kg = () ton () kg.

A bag of flour weighs 25 kilograms today, so () a bag of flour weighs 2 tons.

Pet-name ruby two digits adjacent to the percentile are () and ().

Participate in division with remainder, dividend = () × ()+().

⑾ Use letters to express the algorithm, such as (a+b) × c =

(a×b)×c=

⑿ Five decimal places are recorded as () and read as: ()

Second, judge. (5 points)

① Add "0" or remove "0" after the decimal point, and the size of the decimal point remains unchanged. ( )

② In division with remainder, the divisor must be greater than the remainder. ( )

(3) The decimal with the integer part of 0 is less than 1. ( )

④ The propulsion rate between two regional units is 100. ( )

⑤ Division is the inverse of addition. ( )

Third, multiple choice questions. (Choose a number and write it in brackets. 4 points)

(1) x-28 = 36 The basis for finding the unknown quantity is ().

A, one factor = product ÷ another factor B, one addend = and-another factor.

C, minuend = difference+subtraction

(2) Between 2,372 and 2,329, () should be filled in.

a 、> B 、< C 、=

(3)0.250 means () one thousandth.

25 pounds, 250 degrees Celsius, 2500 pounds

(4)80 is divisible by ().

a、 1 2 6 8 10 7 B、 1 2 10 4 16 20 40 80

c、 1 2 30 40 20 80

Fourth, calculation. (4 1)

1, write directly. (5 points)

72×60+800= 25×40= 53×70= (630-80)÷ 1 1=

480÷30= 270÷3+70= 703×6≈ 5376÷59≈

1-(+)= 1-=

2. Written calculation. (8 points)

308×2 15 34 163÷75 7002-46 18 5762+ 1986

3. Simple calculation. (16)

146+ 155+254+45 1762-73- 127 10 1×28

5600÷35 73×68+32×73 142×59-42×59

999×999+999 125×32×25

4. Find the unknown X. (8 points)

x-756 = 1268 1456÷x = 26

x×73=4380 x÷75 =29

5. Off-mold calculation. (8 points)

8360+(20 1-438÷73) 2790÷(250× 12-299 1)

(374-265+238)×6 50-50÷5+6

5. Column calculation. (6 points)

① What is the product of the difference between 82 and 15 multiplied by the sum of 32 and 18?

② What is the quotient of the difference between 716 and 708 divided by 1680?

③ If a number is larger than 756 by 2 18, find this number (X column solution).

Sixth, the application problem. (22 points)

1. There are four classes in the third grade of the experimental primary school, with 40 students in each class. How many students are there in the third and fourth grades? (Add three-step application questions and answer them. ) (4 points)

There are 72 basketballs in the school, table tennis is 28 more than basketball, and football is 32 less than the sum of basketball and table tennis. How many footballs are there? (3 points)

The typist Xiao Li types 45 words per minute. How many words can Xiao Li 1 hour type in 20 minutes? (3 points)

Five workers built a 900m road in six days. How many meters does each worker build roads every day on average? (Two step-by-step subtitle solutions. ) (6 points)

The store brought 60 bags of rice and flour, each weighing 30 kilograms and each weighing 25 kilograms. How many kilograms more rice is shipped than flour? (Two different solutions. 6 points)

Additional questions (10)

3 coats and 7 pants ***430 yuan, the same 7 coats and 3 pants ***470 yuan, how much is each coat and pants? (10)