《2025年通城学典计算能手四年级数学下册青岛版》

一、口算。
14.8 + 2.2 =
2.6×0.3 =
6.6÷0.3 =
24÷0.6 =
17.8 - 9.6 =
100 - 0.02 =
3.5×0.2 =
3.6÷0.09 =
12÷30 =
420÷21 =
0.1×0.01 =
3.07×1000 =
0.8 + 0.18 =
5.9 - 5 =
2.19 + 9.1 =
0.36×300 =
7.8÷0.6 =
8.4÷0.7 =
0.34÷17 =
2.3×4 =
100÷0.02 =
0.728 - 0.24 =
0.68 + 0.42 =
0.73×2 =
1.3×0.08 =
30÷0.03 =
2.6 + 1.47 =
4.8÷3 =
0.18×5 =
0.52÷0.4 =

答案： 17 0.78 22
40 8.2 99.98
0.7 40 0.4
20 0.001 3070
0.98 0.9 11.29
108 13 12
0.02 9.2 5000
0.488 1.1 1.46
0.104 1000 4.07
1.6 0.9 1.3

二、解方程。
4x÷10 = 12.5
0.5x - 1.4×5 = 3.6
5x + 2.2x = 72

答案： x = 31.25 x = 21.2
x = 10