⑴0.2×0.4=
8.2+1.8=
100-35.22=
⑵2.5×0.4=
2.4×5=
0.22×4=
⑶0.9-0.52=
3.99×1=
0.1×3.52=
⑷8.7×(2.86+7.14)=
2.5×6.45×4=
23.2×0.923.2 15.6×3.23.2×15.6
1×0.360.36 3.6×5.252×0.36
4.5×12 0.8×0.26 0.65×0.13
3.14×0.8 0.49×5.3(保留两位小数) 2.5×0.44