Time: 90 minutes. Full score: 100.
1. Fill in the blanks (every space 1 minute, *** 18)
1, 2.955 rounds an integer (3) and a decimal place (3.0).
2、0. 123÷0. 15=( 12.3 )÷ 15 19÷25=( 76 )÷ 100
3. fill in ">" = "or"
7.2×0.93.57×0. 14
5.243.2×0.0 1
The school bought five soccer balls, each of which cost X yuan. If you paid 400 yuan, you should get back (400-5X) yuan.
5. The stationery store bought 50 pencil cases with a total price of C yuan and a unit price of (C÷50) yuan.
6. Master Wang makes one part every day, five more than Master Zhang, so 3(a-5 means (the number of parts made by Master Wang in three days) and 3 (a-5) means (two people work for three days, and Master Wang does more than Master Zhang). When a = 20, 3 (a-5) = (45).
7. It is the shape seen from the () surface of an object.
It is the shape seen from the surface of an object.
8. The rounded two decimal places are 6.0. The maximum possible value of these two decimal places is (6.4) and the minimum possible value is (5.5).
Second, true or false questions (65438+ 0 points for each question, ***6 points)
1, a number multiplied by a decimal, the product must be less than this number. ( × )
2, 3.5 and 3.50 have the same meaning. ( × )
3,3x+5x-8 is the equation. ( × )
The quotient of 4.37÷4 is an infinite decimal. ( × )
5、( 135- 1.08)÷9= 13.5÷0.9- 1.08÷0.9 ( × )
The sum of 6, 9 and 4 times of x is 9+4x. ( √ )
Three, multiple-choice questions (65438+ 0 points per question, ***6 points)
1, there are (d) decimals between 5.4 and 5.6.
Countless
2. The same formula as the result of 306÷ 1.7 is (c).
A.30.6 \ 17 b . 3.06 \ 17 c . 3060 \ 17d . 306 \ 17
3. The same formula as the result of 0.456×2. 1 is (b).
A.4.56×2 1 b . 2 1×0.0456 c . 45.6×0.2 1d . 456×0.02 1
4. The canteen uses one kilogram of rice every day, and after two days, there are still two kilograms left, the original rice (c) kilograms.
A.a+2 b b . 2a-b c . 2a+b d . 2(a+b)
5. Make a suit cloth of 2.4 meters, and make a cloth of 30 meters at most (B).
A. 12.5
6. Buy 10 kg of rice at 25.5 yuan and 4.5 kg of rice at (a) yuan.
A. 1 1.475 b . 1 1.48 c . 1 1.4d . 1 1.47
Four, the calculation problem (42 points)
1, write the number directly (6 points)
0.3×0.2=0.06 2.4× 10=24 4.2÷0.7=6 3.6÷ 12=0.3
1.2×5=6 9. 1÷0.7= 13 15×0.6=9 0.8-0.35=0.45
0.78÷0.3= 2.6 0.25×4= 1 7.5÷0. 15= 50 100×0.74=74
2, column vertical calculation (12 points)
0.58×0.24 2 1÷24
Check calculation: Check calculation:
1.57÷3.9 3.42×0.25 70.7÷33
(Keep two decimal places) (Keep two decimal places)