① 9.7-22.78÷3.4
② 7.3÷1.25÷0.8
③ 5.6×10.1
④ 6.1×0.64+0.36×6.1
2.4÷30=
1.21÷1.1=
0.63÷9=
4.2÷3=
0.13×5=
32.8÷4=
1.8×0.6=
4.4×0.9=
1.44÷12=
23.7÷30=