①3.01÷7=
②280.8÷24=
③2.7×0.43=
④19.24÷5.2= 验算
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=