2026年通城学典计算能手五年级数学下册苏教版江苏专版第43页答案
一、口算。（每题 1 分，共 24 分）
4.8 - 4.08 =
0.72
56×0.02 =
1.12
23.4 + 3.5 + 26.6 =
53.5

9.99÷0.9 =
11.1
2.5×0.5 =
1.25
8.5 - 4.2 - 3.8 =
0.5

320 - 50 =
270
90÷60 =
1.5
6.4÷(3.6 - 0.4) =
2

1.3×0.06 =
0.078
0.64 - 0.46 =
0.18
30×2.5 + 70×2.5 =
250

40.8÷4 =
10.2
96÷0.3 =
320
770÷1.25÷0.8 =
770

5.1 - 4.3 =
0.8
400×0.04 =
16
99×2.9 + 2.9 =
290

2.58×0.3 =
0.774
8.1÷2.7 =
3
3.55÷4÷3.55 =
0.25

302 + 198 =
500
50×24 =
1200
72.8 + 7.28 + 28.2 =
108.28

答案

一、0.72 1.12 53.5 11.1 1.25 0.5 270 1.5 2 0.078 0.18 250 10.2 320 770 0.8 16 290 0.774 3 0.25 500 1200 108.28

解析

0.72；1.12；53.5；11.1；1.25；0.5；270；1.5；2；0.078；0.18；250；10.2；320；770；0.8；16；290；0.774；3；0.25；500；1200；108.28
二、解方程。（每题 4 分，共 36 分）
5x + 6.32 = 8.72 6.4x - 3.2x = 2.56 0.7(x + 0.48) = 0.49
x - 12.5 + 8.5 = 11 0.5x - 6.4 - 2.6 = 3.2 23×0.2 + 1.7x = 8
7x÷3 = 8.19 2.2x - 0.5×2 = 10 0.5 + 3x + 0.6x = 30.02

答案

二、解：5x + 6.32 = 8.72
5x = 8.72 - 6.32
5x = 2.4
x = 0.48
解：6.4x - 3.2x = 2.56
3.2x = 2.56
x = 0.8
解：0.7(x + 0.48) = 0.49
x + 0.48 = 0.49 ÷ 0.7
x + 0.48 = 0.7
x = 0.22
解：x - 12.5 + 8.5 = 11
x - 4 = 11
x = 15
解：0.5x - 6.4 - 2.6 = 3.2
0.5x - 9 = 3.2
0.5x = 12.2
x = 24.4
解：23×0.2 + 1.7x = 8
4.6 + 1.7x = 8
1.7x = 3.4
x = 2
解：7x÷3 = 8.19
7x = 8.19×3
7x = 24.57
x = 3.51
解：2.2x - 0.5×2 = 10
2.2x - 1 = 10
2.2x = 11
x = 5
解：0.5 + 3x + 0.6x = 30.02
0.5 + 3.6x = 30.02
3.6x = 29.52
x = 8.2