《2025年阳光同学计算小达人四年级数学下册青岛版54》

1. 直接写出得数。（建议4分钟完成）
2.14 - 0.9 = 2.8÷0.7 = 1.57 + 3.43 =
18.54 - 9.9 = 0.5 + 7.6 = 36×99 + 36 =
3.3×2 = 25.8÷6 = 240÷48 =
4.4÷2 = 22.8÷3 = 30×0.01 =
0.35÷0.01 = 6.4÷0.8 = 4.6÷0.23 =
0.05×0.9 = 0.75 - 0.38 = 5.4 - 3.6 - 1.4 =

答案： 1.24 4 5
8.64 8.1 3600
6.6 4.3 5
2.2 7.6 0.3
35 8 20
0.045 0.37 0.4

2. 解方程，带☆的要检验。（建议6分钟完成）
9x - 27 = 9 ☆41 - 3x = 17 4x + 28 = 84
☆10 - 0.3x = 2.8 16 + 0.5x = 24 1.8÷x = 0.3
☆7x + 56 = 112 8.8 + 5.5x = 15.4 3.6x - 3.24 = 1.08

答案： x = 4 x = 8 x = 14
x = 24 x = 16 x = 6
x = 8 x = 1.2 x = 1.2

关于x的方程7.5 - x = 2.4与ax = 25.5有相同的解，求a的值。

答案： 提升练 a = 5