①248×12=
②105×33=
③450×38=
④589×68=
⑤402×15=
⑥270×24=
4.83÷0.07=÷7
1.96÷0.8=÷8
0.68+19.6= = 0.56÷0.4= 0.125×8=
12= 0.22×200= 100﹣0.86= =