72÷3.8≈
75.6÷1.8=
8.91÷0.27=
2.6÷0.13=
0.21÷1.4=
1.12÷0.56=
7.35÷2.1=
19.8÷45=
1÷0.025=
2.5×103 =
0.702×15=
3.15×0.14=
3.58×0.22 (精确到百分位)
3.5×0.506 (保留一位小数)
16.5×38