列竖式计算.(带☆的要验算,带*的要保留两位小数) ①0.27×0.45= ②☆3.05×2.4= ③0.51÷0.12=

2024-11-21 21:25:18
推荐回答(1个)
回答1:

①0.27×0.45=0.1215;
0.27
× 0.45

.
135

108
0.1215


②3.05×2.4=7.32;
3.05
× 2.4

.
1220

610
7.320

验算:
2.4
× 3.05

.
120

72
7.320


③0.51÷0.12=4.25.
4.25
12 51

48
30

24
60

60
0


④6.24÷0.4=15.60.
15.6
4 62.4

4
22

20
24

24
0