《2025年通城学典计算能手四年级数学下册青岛版》

 一、口算

0.09×800 =
5.5 - 0.11 =
9.78 - (0.78 + 3) =
10÷25 =
7.5÷0.75 =
45÷0.5÷9 =
0.7 + 0.77 =
0.06×90 =
0.1÷0.01×0.8 =
9.5÷0.19 =
10.5÷1.5 =
930÷(5×0.6) =
4 - 0.9 =
9.9÷0.03 =
0.25×8.5×4 =
40÷0.8 =
3.6÷0.06 =
23 - 3.8 - 16.2 =
3.2 + 0.5 =
0.14×50 =
0.2×(0.2 + 0.2) =
1.4×0.8 =
24÷48 =
2.5×(4÷0.5) =
9.8÷49 =
6÷1.2 =
1.5 - 1.5×0.3 =
1.2×50 =
0.8×0.05 =
0.5×101 - 0.5 =

答案： 72 5.39 60.4 10 101.47 5.4 850 7 3103.1 330 8.550 60 33.7 7 0.081.12 0.5 200.2 5 1.0560 0.04 50

### 二、解方程

$6x - 12.8×3 = 0.06$
$7(6.5 + x) = 87.5$
$(x - 12)÷4 = 4.5$

答案： x = 6.41 x = 6x = 30