2.74×0.98◯2.74 1.9×0.78◯0.78 4.75×1◯4.75
8.5×15◯85×1.5 86×0.27◯0.27×8.5 6.3×0.98◯6.4×1.04
0.38×0.25= 0.87×1.9=(得数保留两位小数)
150×0.12= 8.5×0.39=(验算)
☆3.6×5.4= 4.2×2.03=
3.45×2.3= 6.8×0.76≈(保留两位小数)
3.3×6.9=22.77
3.33 ×66.9=222.777
3.333×666.9=
......
88.83÷9=9.87
88.884÷9=9.876