《2025年通城学典计算能手四年级数学下册青岛版》

## 周二
11 练习课
### 一、口算

420 - 98 =
3.5÷0.05 =
4.25 + 5.75 =
5.4×0.6 =
0.08 + 1.2 =
0.3×0.3 =
6.8 - 0.08 =
80÷160 =
1.5 - 0.375 =
70÷3.5 =
3.28 + 7.2 =
72÷0.9 =
0.25×0.3 =
2.39 - 0.4 =
0.8×0.13 =
1.2÷0.03 =
200×0.45 =
9.1 - 5.7 =
47 + 63 =
4.8÷0.12 =
1.6÷0.25 =
1.25÷0.25 =
0.125×4 =
7÷0.35 =
4.04÷2 =
2.8÷100 =
0.85÷5 =
0.45×4 =
24÷0.24 =
0.2×0.5 =

答案： 322 70 103.24 1.28 0.096.72 0.5 1.12520 10.48 800.075 1.99 0.10440 90 3.4110 40 6.45 0.5 202.02 0.028 0.171.8 100 0.1

### 二、计算下面各题，怎样简便就怎样计算

102×0.45
(1.3 + 0.8)÷(1.4×0.5)
(9.3×2 + 9.3×6)×1.25

答案： 45.9 3 93