Class name _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
I. Fill in the blanks (14)
1.0.25× 4 is for (), and 0.25×0.4 is for ().
2.7.56×5.4=40.824, from which we can get: 756×5.4=() 76.5×0.54= ().
40.824÷5.4=( ) 40.824÷54=( )
3. The product of1.1× 3.6, with one decimal place reserved, is about ().
4. Arrange 9.2 1, 9.2 1 1, 9.2 () in descending order.
5. It is known that the product of two factors is 0.24, one of which is 0.3 and the other is ().
6. When calculating the division, the dividend is enlarged by 100 times, and the divisor is also enlarged by 100 times. Their quotient ().
7.4. The product of1× 2.85 has () decimal places.
8. If the multiplier is less than 1, the product is (); If the divisor is less than 1, the quotient is ().
Second, the judgment (right painting, wrong painting ×)(5 points)
1. Cyclic decimal must be infinite decimal. ( )
2. Divider is a fractional division of integers, and the decimal point of quotient should be aligned with the decimal point of dividend. ( )
3.8.1149 ≈ 8.12 () 4.2.26 hours =2 hours and 26 minutes. ( )
5. When two numbers are divided, the quotient must be less than the dividend. ( )
Three, choose (number of correct answers in brackets) (5 points)
1. When calculating 7-0.5× 14+0.83, the () should be calculated first.
a . 7-0.5 b . 0.5× 14 c . 14+0.83
The quotient of 2.2 ÷ 3 is ().
A. Pure cyclic decimal B. Mixed cyclic decimal C. Infinite cyclic decimal
3.3.87 Retaining three decimal places is about ().
A.3.879
4. Among the following three figures, the biggest one is ().
0.70 1 1 0.70 0.70 1 a . 0.70 1 1 b . 0.70 c . 0.70 1
5. If the divisor is divided by 12, the dividend should be () to keep the quotient unchanged.
A. divided by12 b. multiplied by12 c. unchanged.
Fourth, write the calculation results directly. (10)
3× 1. 16= 5.79+2.63+4.2 1= 0.25× 12= 1.2÷4= 1.35×6=
1.68÷0.3= 10-0. 18-0. 12= 0.54× 10 1= 0.64÷ 1.6× 1.7= 6.5-5=
The verb (the abbreviation of verb) finds the unknown x.( 12 points)
x÷0.75 = 1.54 1.8×x = 2. 16 x+6.53 = 2 1. 1 26.74-x = 1.9
Sixth, calculation. (15)
6.33× 10 1-6.33 1.6×55.4-55.4×0.6 17.68÷5.2+2.7× 1.5
35.6-5× 1.73 ( 1. 1-0.78)×(2.7- 1.95)
Seven, column calculation. (9 points)
1. Multiply the sum of 14.8 1 and 5. 19 by their difference. What is the product?
2. What is the product of the sum of126.8 and 15.7 multiplied by 1.02?
3.0.6 times the product of 0.8, plus 0. 12, and then divided by 1.2, what is the quotient?
Eight, application questions. (25 points)
1. Pingyuan machinery factory plans to produce 56 machine parts every day, which will be completed in 28 days. In fact, 42 more are produced every day. Actually, it will take a few days to finish.
2. Three classes in Grade Five planted 156 trees. According to this calculation, if you count the other two classes, how many trees will be planted in the fifth grade?
Two cars leave from two places 539 kilometers apart at the same time. Car A travels at a speed of 88.5 kilometers per hour, and car B travels at a speed of 65.5 kilometers per hour. How many hours did the two cars meet?
Eight cars saved 50.4 kilograms of gasoline in five days. According to this calculation, how many kilograms of gasoline did 25 cars save in 7 days?
5. Processing 1620 parts can be completed in 6 hours if both parties start work at the same time. It is known that A processes 150 pieces per hour, and how many pieces does B process per hour?