一、保留一位小数
4.5×0.1≈ 2.2×0.8≈ 1.6×0.9≈
0.76×0.4≈0.07×1.25≈7.6×0.01≈
0.32×0.7≈ 2.76×0.07≈ 3.62×0.2≈
0.9×0.8≈0.47×0.8≈ 2.69×0.8≈
0.56×0.9≈0.7×2.3≈0.7×0.88≈
1.88×0.5≈0.77×0.09≈ 1.8×0.06≈
二、保留两位小数
4.56×0.06≈0.05×28.18≈7.56×0.01≈
9.65×0.04≈0.06×0.12≈0.05×0.98≈
7.96×0.03≈7.56×0.07≈0.49×0.02≈
5.7×0.09≈ 5.45×0.3≈0.31×0.06≈
2.14×0.07≈0.49×0.01≈0.09×0.19≈
0.44×0.03≈ 6.02×0.07≈0.08×0.05≈
0.55×0.9≈0.39×0.1≈0.56×0.04≈
0.55×0.7≈