1.3/7 × 49/9 - 4/3

2.8/9 × 15/36 + 1/27

3. 12× 5/6 – 2/9 ×3

4.8× 5/4 + 1/4

5.6÷ 3/8 – 3/8 ÷6

6.4/7 × 5/9 + 3/7 × 5/9

7.5/2 -( 3/2 + 4/5 )

8.7/8 + ( 1/8 + 1/9 )

9.9 × 5/6 + 5/6

10.3/4 × 8/9 - 1/3

1 1.7 × 5/49 + 3/ 14

12.6 ×( 1/2 + 2/3 )

13.8 × 4/5 + 8 × 1 1/5

14.3 1 × 5/6 – 5/6

15.9/7 - ( 2/7 – 10/2 1 )

16.5/9 × 18 – 14 × 2/7

17.4/5 × 25/ 16 + 2/3 × 3/4

18. 14 × 8/7 – 5/6 × 12/ 15

19. 17/32 – 3/4 × 9/24

20.3 × 2/9 + 1/3

2 1.5/7 × 3/25 + 3/7

22.3/ 14 ×× 2/3 + 1/6

23. 1/5 × 2/3 + 5/6

24.9/22 + 1/ 1 1 ÷ 1/2

25.5/3 × 1 1/5 + 4/3

26.45 × 2/3 + 1/3 × 15

27.7/ 19 + 12/ 19 × 5/6

28. 1/4 + 3/4 ÷ 2/3

29.8/7 × 2 1/ 16 + 1/2

30. 10 1 × 1/5 – 1/5 × 2 1

3 1.50+ 160÷40

32. 120- 144÷ 18+35

33.347+45×2-4 160÷52

34.(58+37)÷(64-9×5)

35.95÷(64-45)

36. 178- 145÷5×6+42

37.8 12-700÷(9+3 1× 1 1)

38.85+ 14×( 14+208÷26)

39.(284+ 16)×(5 12-8208÷ 18)

40. 120-36×4÷ 18+35

Second,

7.2 18÷36

5.93×0.76 (three decimal places are reserved)

16.32÷5 1

5.24÷7.2 This number has two decimal places.

3.54× 13

20-5.674

5.84÷0. 16

5.4÷0.036

8÷ 1 1 (using cyclic decimals to express quotient)

0.86×7

2. 14×62

0.375× 12

1.8×395

0.45× 108

1.056×25

1.8×23

0.37×0.4

1.06×25

7×0.86

0.6×0.39

27×0.43

Third,

( 1)2x+8= 16

(2)x/5= 10

(3)x+7x=8

9x-3x=6

(5)6x-8=4

(6)5x+x=9

(7)x-8=6x

(8)4/5x=20

(9)2x-6= 12

( 10)7x+7= 14

( 1 1)6x-6=0

( 12)5x+6= 1 1

( 13)2x-8= 10

( 14) 1/2x-8=4

( 15)x-5/6=7

( 16)3x+7=28

( 17)3x-7=26

( 18)9x-x= 16

( 19)24x+x=50

(20)6/7x-8=4

Fourth,

1, Xiao Qiang took 15 yuan to go shopping in the supermarket. The prices of some goods in the supermarket are as follows:

Notebook (notebook)

Pencil (branch)

Ruler (root)

Knife (handle)

Triangular plate (pair)

Pen (branch)

6.30 yuan

0.60 yuan

1.20 yuan

2.4 yuan

4.50 yuan

6.70 yuan

Xiao Qiang can only buy a few kinds of goods at most.

(2) If I buy two pens, how much should I refund?

2. The perimeter of the triangle is 16.4cm, in which the first side and the second side are 5cm respectively. How long is the third side?

3. Xiao Zhang, Xiao Li and Xiao Wang weigh themselves. The total weight of Xiao Zhang and Xiao Li is 90.8 kg, and the total weight of Xiao Wang and Xiao Li is 88.5 kg. How many kilograms is Xiao Zhang heavier than Xiao Wang?

The Zhang family planted three responsibility fields. The first one is 1080 m2, which is more than the second one 15.7 m2, and the third one is 8.5 m2 less than the first one. Please ask at least two questions and answer them according to what you know.

5. Dad is 0.52 meters taller than Xiaohong, 0.2 1 meter taller than Mom, and how many meters taller than Xiaohong?

6. The supermarket has an infrared remote control tank toy, the price is 130.00 yuan, which is cheaper after the discount 13.00 yuan. Xiaoming is going to buy this toy tank with the money from buying two mini cars, each 55 yuan. Does he have enough money? If not, how much money is left?

7. This year, the cement plant allocated 3.324 million yuan for pollution control, 2.347 million yuan for sewage tank renovation, and another 855,000 yuan. How many million yuan does the factory have for pollution control now?

8.b is in the middle between A and C. After the car A is released from A for 48.5 kilometers, it is still 14.5 kilometers away from B. At this time, how many kilometers is the car from C?

9. The original price of a children's suit in Asia is 125.90 yuan, and the promotion price for celebrating June 1st is 98.80 yuan. How much cheaper?

10, Xiao Wang weighs 36.5 kg, Xiao Li weighs 4 1.4 kg, and sumo wrestlers weighs 125.8 kg. How many kilograms does this athlete weigh more than Xiao Wang and Xiao Li combined?

1 1, Xiao Qiang is 0. 19 meters higher than Xiao Fang, Xiao Fang is 22 centimeters shorter than Tiger, and Tiger is several meters taller than Xiao Qiang.

12, someone bought an item and paid it to 50 yuan, the shop assistant. The clerk misread the decimal point of this item and gave him 46.75 yuan. He said he found too much. What is the price of this project?

13, the fruit shop sent three baskets of apples, 30.5 kg each. How many kilograms did a * * * send? If the price of apples per kilogram is 2.6 yuan, how much can these apples earn?

14, the average daily electricity consumption of the school 17.3 kwh, how many kwh will be used in May? If you use 0.5 yuan per kilowatt hour, how much electricity will you pay this month?

15, Wuxi Lingshan Giant Buddha is 88 meters high, which is 1. 15 times higher than Sichuan Leshan Giant Buddha. How high is Leshan Giant Buddha in Sichuan?

16, the fruit shop sells 32.5 Jin of apples every day, which is 0.9 times that of the first day every two days.

How many catties of apples do you sell the next day? How many kilograms do you sell the next day?

17, Xiaoming bought two composition books in the bookstore, one 10.8 yuan and one 7.6 yuan. He paid 20 yuan. How much should he get back?

1, the turnover of Li Hong Supermarket on Monday was 23,500 yuan, and the turnover on Tuesday was 1.3 times that on Monday. How much more than 10 thousand yuan a day (the result is reserved to one decimal place)

2. The length of a window glass is 1.3m, and the width is 1. 1m, so how many square meters of glass is needed to make 12 such windows (the result is an integer).

3. The length of parallelogram land is 3.5m longer than its height. Known base length16.8m. What is the area of this land?

3 yuan per kilogram of apples, 2.2 yuan per kilogram of oranges, and Xiaoming bought 5 kilograms of apples and oranges with 30 yuan money respectively. How much should he get back?

5. The average of the three numbers A, B and C is 5, and half of the two numbers B and C is 4.5. What's the number of a?

6. The school handicraft group made 28 handicrafts with 95.2 square decimeters of colored paper. How many square decimetres of paper does each handicraft use on average?

7. Xiao Minghua 16.5 yuan bought 5 kilograms of apples, and Xiao Honghua 2 1.7 yuan bought 7 kilograms of apples. Who bought it more expensive? 8. Four giant pandas ate 36.24 kilograms of bamboo leaves in three days. How many kilograms of bamboo leaves does each giant panda eat on average every day?

9. The distance between Party A and Party B is 66 kilometers. It takes 1.2 hours for the ship to get from A to B, and 1 hour for the return trip. What is the average speed of the ship going back and forth?

10, 120 kilograms of rapeseed can extract 38 kilograms of rapeseed oil, and how many kilograms of rapeseed oil can be extracted per kilogram (the result is retained after one decimal point).

1 1, a rectangular vegetable field, which is 1 1 m long and 2m longer than its width. In this vegetable field, 445.5 Jin of cabbage is harvested. How many Jin of cabbage is harvested per square meter on average?

12, a batch of 75 tons of goods has been shipped six times, leaving 4 1.4 tons. How many tons are shipped on average, and how many times will the rest be shipped (the result remains an integer)

13, class five (1) has 45 people joining the interest group, which is 1.5 times that of class five (2). How many people in Class Two joined the interest group?