《2025年通城学典计算能手四年级数学下册青岛版》

一、口算。
3.5 + 7.6 =
1.23÷3 =
4.8×2.5 =
0.37×0.1 =
0.2×0.74 =
7.2 + 2.8 =
5 - 1.2 =
9.9÷0.11 =
15×0.6 =
0.78÷0.3 =
0.64÷0.04 =
7.5 - 0.15 =
6.25×2 =
13.8÷0.6 =
250×0.2 =
2.4÷0.04 =
100 - 43 =
2.7÷0.3 =
0.25 + 3.45 =
7.8×0.4 =
7.9 + 5.4 =
3×0.32 =
0.64÷0.4 =
0.4÷0.8 =
0.63÷7 =
0.2×160 =
0.65×0.3 =
1.25×800 =
0.62 - 0.43 =
0.96÷1.2 =

答案： 11.1 0.41 12
0.037 0.148 10
3.8 90 9
2.6 16 7.35
12.5 23 50
60 57 9
3.7 3.12 13.3
0.96 1.6 0.5
0.09 32 0.195
1000 0.19 0.8

二、计算下面各题，怎样简便就怎样计算。
0.18÷[0.3×(8 - 6.5)]
1200÷25÷4
(3.7 + 1.7×0.4)÷2.5

答案： 0.4 12 1.752