《2025年通城学典计算能手四年级数学下册青岛版》

一、口算。
4 - 0.25 = 5.01×60 = 0.5 + 0.5÷0.5 =
0.99÷33 = 4.8÷8 = (2.72 - 2.7)×3.5 =
1.3×6 = 4.5 + 0.15 = 2.1×40÷10 =
9.12÷0.01 = 0.6×5 = 1.8×0.4×0.25 =
4.4÷2.2 = 40×0.04 = 1.36 + 2.87 + 3.64 =
0.7×0.13 = 3 - 1.53 = 1.2×(5÷0.25) =
0.63 - 0.3 = 81÷0.9 = 26.1 - 3.5 - 7.5 =
0.38×3 = 1.05 + 3.45 = (0.03 + 0.12)÷1.5 =
1.08÷0.2 = 0.2×96 = 1.2×99 + 1.2 =
3.6 + 7.6 = 100÷1000 = 17.2 - (8.15 + 7.2) =

答案： 3.75 300.6 1.5
0.03 0.6 0.07
7.8 4.65 8.4
912 3 0.18
2 1.6 7.87
0.091 1.47 24
0.33 90 15.1
1.14 4.5 0.1
5.4 19.2 120
11.2 0.1 1.85

#### 二、解方程。

1.4x + 3.6 = 7.8 2.7x + 1.8x = 10.8 0.9x - 5.4×0.2 = 3.6

答案： x = 3 x = 2.4x = 5.2