《2025年通城学典计算能手四年级数学下册青岛版》

### 一、口算
75 + 35 =
95×0.2 =
132÷3 =
5×4.6 =
4.7÷0.47 =
4.4 + 4.06 =
1.52÷4 =
1.4 + 0.78 =
240÷0.3 =
0.7×0.12 =
0.72÷2.4 =
0.72÷3 =
6.4÷3.2 =
3 - 0.27 =
0.25×100 =
0.2×53 =
700÷14 =
2.1÷0.07 =
490 + 510 =
12×60 =
5.3 - 0.13 =
7.5×0.4 =
3.3×0.03 =
2.8 + 7.5 =
2÷0.25 =
1.44÷1.2 =
14.4÷9 =
9.6÷6 =
9×0.4 =
0.84÷4.2 =

答案： 110 19 44
23 10 8.46
0.38 2.18 800
0.084 0.3 0.24
2 2.73 25
10.6 50 30
1000 720 5.17
3 0.099 10.3
8 1.2 1.6
1.6 3.6 0.2

### 二、解方程

$x - 0.8x = 6$
$4x÷6 = 1.8$
$1.4×3 + 7x = 5.6$

答案： x = 30 x = 2.7x = 0.2