0.7×6=
3.2×0.2=
m+6m=
8.1÷9=
4÷8=
8b-3b=
7.6-0.6= 0.8×100= 1.9+9.1= 3.6÷0.9=
7.2÷8= 0.2×0.9= 5.1÷0.01= 4×1.5=
1.4+1.4÷1.4= 8.3×0.9+0.83=
0.32×0.22=
25.2÷0.24=
3.08×0.26≈(保留一位小数)
1.55÷3.9≈(保留两位小数)
2.5×20.5+7.5×20.5=(+)×20.5
(1.7×2.5)×=1.7×(×4 )