6.90.99×6.9 3.99×13.99 12.712.7×1.8
0.6×0.8=48 1.6×0.9=144
2.02×1.8=3636 30.6×4=1224
97×1.0297 85×0.9585 4.84.8×1.22
163×1.8163 163×0.18163
2.7×12.7× (0.8+0.2) 7.3×6.464×0.73
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=