①a×0.6②a÷0.6③a×0.8④a÷0.8
1.02×0.5=
1.25×0.8=
0.58+0.42=
36.12÷4=2
10-9.35=
9.9+0.1÷10=
2.44÷0.4=
0.3÷0.3×0.3÷0.3=
91.2÷57=
3.4×0.36=
1.5÷0.45=(用循环小数表示)
31.5×0.931.5 5.42÷0.95.42 0.98×10.98
2.5×0.82.5÷0.8 3.56÷1.013.56 4.95÷14.95