1, write the number directly (8 points)
150×3= 900÷9= 880×0= 420÷7=
120×20= 4 1×2= 160×4= 55÷5=
2. Estimate (12 points)
208×29≈ 392×2 1≈ 48× 192≈ 580×62≈
32 1× 18≈ 30 1×38≈ 98×22≈ 40×99≈
3, vertical calculation (9 points)
305×74= 5 12×52= 360× 15=
4. Calculation of parting (12)
87+(5 10- 150×3) 48×( 103+97)-23 1
3008-46×25+298 96÷(3+ 15÷5)
Please look carefully, think carefully, and put your exploration in brackets (3 1).
(a) fill in a fill (15 points)
1, the distance between the earth and the moon is about 384,400 kilometers, and this number is written as () kilometers.
2. In 70908080, "7" means () and "9" means ().
3. From the unit, the () bit on the left is 10,000, and the () bit is 100 million.
4. The two factors are 36 and 50 respectively, and the product is (). If you rewrite the factor 50 to 500, the product is ().
5. Omit the mantissa after the following tens of thousands of digits and find the approximate number.
8733200≈( ) 898300≈( )
6. In a certain year, primary and secondary school students in China 12 156.7 1 10,000 people wrote ().
7. You can draw a () straight line through one point on the plane and draw a () straight line through two points on the plane.
8. The positional relationship between two straight lines in the same plane is () or ().
9. () is the shortest between two points.
(2) Choose one (16 points)
1, the following figures are rounded to 1 billion, and the figure is ().
a 190000000 B 100850000 C 997050000
2. Add () zeros between 6 and 3 to make 60,003.
A 3 B 4 C 2 D 5
3, read-only zero in the following figures is ().
a 50000000 B 32 1040000 C 70200004D 364500000
A square swimming pool is 400 meters in circumference and covers an area of () hectares.
a、 10000 B、 1 C、400 D、 16
5. The simple algorithm of125× 24 is ().
A: 125×6×4 b: 125× 12×2 c: 125×8×3
6, the light from the flashlight can be regarded as ()
A line segment b ray c straight line
7. Measuring a straight runway of 100m on the playground can be regarded as ().
A line segment b ray c straight line
8. The product of 3 10×70 is equal to ().
a 370× 10 B 3 100×7 C 3 10× 10
Three, the use of knowledge to solve problems in life (28 points)
1. Frogs can catch about 58 mosquitoes every day on average. How many mosquitoes can they catch a month? (4 points)
Last year, the school bought 52 sets of desks and chairs, one for 80 yuan and one for 25 yuan. How much did it cost? (4 points)
3. Two cars, A and B, leave from two places at the same time. A car speed 150 km, B car speed 80 km. Six hours later, two cars met. How many kilometers is it between A and B? (5 points)
4. The teacher leads the students to an autumn outing. Each ticket and admission ticket is ***49 yuan, and one * * has10/person (including the teacher). Is it enough to bring 5,000 yuan? (5 points)
5. How many square centimeters of iron does it take to make a triangle warning sign with a bottom of 60 cm and a height of 52 cm? A parallelogram iron sheet with a base of 180 cm and a height of 52 cm can make several such warning signs. (5 points)
6. Team A and Team B cooperated to build a canal. After a period of time, Team A repaired 37 parts of the canal and Team B repaired 27 parts of the canal. How many more parts of this canal did Team A build than Team B? Which part of the canal was built by two teams? Have they fixed it? (5 points)
I. Fill in the blanks (7 points)
The product of 1 and 5.2×0.43 has () decimal places.
2. The number consisting of five 1000, seven 0. 1 and two 0.0 1 is ().
The decimal point of 3.8.964 is shifted three places to the right, and the decimal point is () times.
4、8.6×0.72=( )×7.2
5. Expand 0.856 into decimals. The decimal with one digit is (), and the decimal point is moved to ().
Second, write numbers directly (12 points)
0.7×6= 0.07× 1000= 0. 1×5.7= 1.6×0.8=
2.5×4= 0.74×0.4= 7.5×3= 3.74×0=
0.8×0.6= 0.06×0.08= 80× 1.25= 0. 13×4=
Iii. Calculate the following problems with simple methods (16 points)
① 2.4× 12.5= ② 9.43× 10 1= ③ 3.4× 12.5+6.6× 12.5 ④ 0. 125×9.3×0.8
Four, the calculation problem (26 points)
1, with vertical calculation:
16.25× 34 = 9.34× 4.2 =15.03× 9.8 = 9.02× 0.56 = (the number shall be kept to two decimal places).
2. Calculate by recursive equation:
8 1.25× 10.4×9.3 15×5.9+4.83 98.42×2.5-83.7 700×0.34×3.7
Five, column calculation (9 points)
What is the 4.5 times of 1 and 63.62?
2. Expand the product of 7.2 and 1 1.2 by 30 times. What is the result?
What's the difference between 3.4.25 and 0.9 times 0.4?
Six, solve the problem (30 points)
1. A piglet eats an average of 5.3 kilograms of feed every day. According to this calculation, how many kilograms of feed do five piglets need to eat a week? (6 points)
2. The vegetable station put in cucumber 1.2 tons, the potatoes put in were 1.5 times that of cucumber, and the cabbages were 2.3 times that of potatoes. How many tons of cabbage did the vegetable station send? (6 points)
3. There is a small square with a side length of 1.5 decimeter. If four small squares are used to make a big square, what is the area of this big square? (6 points)
The playground in bright primary school is 85.5 meters wide, which is half the length. What is the area of the playground? (6 points)
Zhao Bing and Li Wei have 50 stamps. If Yang Bing gives Ma Xiaohui four stamps, they have exactly the same number of stamps. How many stamps do Yang Bing and Ma Xiaohui have? (6 points)
1, the number written directly (10 points)
2/7×2= 3/5 × 1= 3/4 × 1/3= 1/2×3/4= (2+3) 1/3=
5/28 ×7= 4/5 ×4/7= 5-3/7= 7/24 ×3/ 14= ( 1/6+5/6)× 15=
2. Use your favorite method to calculate (18 points)
( 1/4 +3/4)× 13 40/ 13 ×39×7/80 5/7 × 14 +34 ×5/7
( 1/4 + 1/5 )×4×5 2009× 2007/2008 24× 5 1/43 +5 1× 19/43
3, column calculation (12 points)
What are the three quarters of (1)89?
(2) How much is the 1/3 of 24 more than its 1/4?
(3) What is the sum of1/3 and 1/4 plus their products?
(4) What is the product of 9 and its reciprocal multiplied by 7/9?
Fill in the blanks (28%)
⑴ 4/5×7=( ); 8×3/4=( )。
(2) 3/5 hours = () 5/8 kilograms = () grams.
125m2 = () square decimeter 3.4m = () decimeter
(3) The reciprocal of the smallest prime number is (-), the reciprocal of 0.25 is (-), and the reciprocal of 7/3 is (-).
⑷ 1/6 ×( )=7/ 13 ×( )= 17/ 13 -( )=( )×0.3 = 1
5. Fill in ""or "=" in ○.
6/7×59 06/7 5/8×75 05/8 65 03/4×65 5m 1/6 1m 5/6。
[6] "710 of the number of pine trees is equivalent to the number of cypress trees" means that () is regarded as the unit "1"; "Compared with August, the water consumption in September is 2/ 1 1", and the unit is ().
At the beginning of the new semester, students should choose a squadron leader. Of the ***60 people who participated in the election, 3/5 agreed that Xiaoming was elected, 7/ 10 agreed that Xiaohong was elected, 5/6 agreed that Xiaodong was elected, and () got the least votes.
Right: ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
(9) A rope is 89 meters long, cut off 14, leaving (-) and () meters. If you cut off 1/4 meters, there will be () meters left.
⑽ It is known that A× 67 = B× 65 = 68× C, and A, B and C are not equal to zero, then () is the largest and () is the smallest among the three numbers of A, B and C..
Third, multiple-choice questions (12%)
1, if a is a natural number not equal to 0, then ().
① 1A is reciprocal 2a and 1A is reciprocal 3a and 1A is reciprocal.
2. The reciprocal of () is greater than itself.
① False scores ② True scores ③ There are scores.
3. (47+13) × 21= 47× 21+13× 21,which is the application of ().
① Multiplicative commutative law ② Multiplicative associative law ③ Multiplicative distributive law
4. Cut the 3-meter-long rope four times, cut it into equal lengths, and then ().
① each section is 3m14; ② Each segment is 35 1m; ③ Each section is 35 of the total length.
5. Two wires with the same length, one used13m, the other used13m, and the remaining wire ().
① The first root length ② The second root length ③ The same length ④ It is impossible to compare which root length.
6. After the students in Class 1, Grade 6 are transferred to 15, it is exactly equal to the number of students in Class 2, Grade 6. It turns out that the number of students in Class Two, Grade Six is Class One, Grade Six (). ①
25 ② 35 ③ 45
Fourth, solve the problem (30%)
1, only column types are not counted (8 points)
(1) Distance between Party A and Party B100km. A car walked 4/5 of the whole journey. How many kilometers has it traveled?
(2) The number A is 56, the number B is 17 of the number A, and the number C is 1/8 of the number B. What is the number C?
(3) A rectangular piece of land is 42 meters long and 57 meters wide.
(4) What is the area of this land?
2. One batch of cement used 12 tons, and the rest was 1/6. How many tons were used? How many tons is this batch of cement? (4 points)
A new flour mill grinds 56 tons of flour every hour. How many tons are grinded by three such machines 1/2 hours? (4 points)
4. A rope is 30 meters long, and you have to walk 3/5 meters for the first time. How many meters to go, only 1/2 of this rope is left? (4 points)
5. Three classes in Grade 6 of Renmin Road Primary School participated in tree planting. One class planted 48 trees, and the trees planted in Class Two were 5/6 of those planted in Class One. Class three planted four more trees than Class two. How many trees have Class Three planted? (5 points)
6. Zhou Xun plans to finish reading a story book with 1 20 pages in1week (7 days). On the first day, he read15 of the whole book, and the rest read 16 pages every day. Can he finish reading in the scheduled time? (5 points)