《2025年通城学典计算能手四年级数学下册青岛版》

 一、口算

0.42÷6 =
1.8 + 0.32 =
0.3×(0.2 + 3) =
0.52 - 0.4 =
1.8×40 =
2.5 - 36÷18 =
5.1÷1.7 =
0.11×0.7 =
(2 + 0.25)×4 =
14×50 =
20.1÷3 =
16 - 4.5 + 5.5 =
1.9 - 0.85 =
3.75×0.2 =
4×1.2×2.5 =
1.8÷30 =
0÷0.15 =
13 - (0.5 + 4) =
3×2.01 =
10÷0.01 =
2.1 + 5.1÷1.7 =
1.25×80 =
0.75 + 0.5 =
(2 + 2.8)÷3 =
0.15÷0.3 =
3÷20 =
6÷(0.5×20) =
92÷2.3 =
8 - 2.5 =
3.65 + 3.65×9 =

答案： 0.07 2.12 0.960.12 72 0.53 0.077 9700 6.7 171.05 0.75 120.06 0 8.56.03 1000 5.1100 1.25 1.60.5 0.15 0.640 5.5 36.5

### 二、计算下面各题，怎样简便就怎样计算

(9 - 0.55)÷(2.4 + 4.1)
9.12 + 9.12×9 - 60.2
80×[(1.75 + 2.5)÷0.8]

答案： 1.3 31 425