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1. 直接写出得数。(16☆)
$2.5×8 = $
$0.32×100 = $
$3×0.9 = $
$24.4÷0.04 = $
$4.2÷0.3 = $
$4.7×0.2 = $
$4÷0.1 = $
$3.63÷11 = $
$18×0.25 = $
$2.4×5 = $
$8.6÷4.3 = $
$22.5÷0.5 = $
$96÷30 = $
$7.8×0.2 = $
$9.6÷4 = $
$1.4×0.5 = $
$132÷11 = $
$2.4×6 = $
$1.26×5 = $
$0.77÷1.1 = $
$9.3×0.4 = $
$4.33×2 = $
$3.45×4 = $
$3.7×50 = $
$8.4÷1.2 = $
$32.4÷0.8 = $
$0.7×0.5 = $
$4.47÷0.1 = $
$168÷0.4 = $
$4÷0.01 = $
$0.441÷3 = $
$32.5×0.4 = $
$2.5×8 = $
20
$0.32×100 = $
32
$3×0.9 = $
2.7
$24.4÷0.04 = $
610
$4.2÷0.3 = $
14
$4.7×0.2 = $
0.94
$4÷0.1 = $
40
$3.63÷11 = $
0.33
$18×0.25 = $
4.5
$2.4×5 = $
12
$8.6÷4.3 = $
2
$22.5÷0.5 = $
45
$96÷30 = $
3.2
$7.8×0.2 = $
1.56
$9.6÷4 = $
2.4
$1.4×0.5 = $
0.7
$132÷11 = $
12
$2.4×6 = $
14.4
$1.26×5 = $
6.3
$0.77÷1.1 = $
0.7
$9.3×0.4 = $
3.72
$4.33×2 = $
8.66
$3.45×4 = $
13.8
$3.7×50 = $
185
$8.4÷1.2 = $
7
$32.4÷0.8 = $
40.5
$0.7×0.5 = $
0.35
$4.47÷0.1 = $
44.7
$168÷0.4 = $
420
$4÷0.01 = $
400
$0.441÷3 = $
0.147
$32.5×0.4 = $
13
答案
20 32 2.7 610 14 0.94 40 0.33 4.5 12 2 45 3.2 1.56 2.4 0.7 12 14.4 6.3 0.7 3.72 8.66 13.8 185 7 40.5 0.35 44.7 420 400 0.147 13
2. 计算下面平行四边形的面积。(单位：cm)(10☆)
(
(
180 cm²
) (36 cm²
)答案
180 cm² 36 cm²
3. 列竖式计算,带*的保留两位小数。(12☆)
$7.56÷2.4 = $
$*0.74×3.65\approx$
$243.2÷64 = $
$7.56÷2.4 = $
3.15
$*0.74×3.65\approx$
2.70
$243.2÷64 = $
3.8
答案
3.15 2.70 3.8
4. 解方程。(12☆)
$(5x + 2)×3 = 27$
$1.2x - 0.5x = 6.3$
$(8 - x)÷5 = 1.5$
$(5x + 2)×3 = 27$
x = 0.5
$1.2x - 0.5x = 6.3$
x = 9
$(8 - x)÷5 = 1.5$
x = 1.4
答案
x = 1.4 x = 9 x = 0.5
