0.87*3.16+4.64=0.29×9.48+4.64
=0.29×（10-0.5-0.02）+4.64
=2.9-0.145-0.0058+4.首亚记校坏下64
=7.54-0.1508
=7.3892
0.87*3.16+4.64=用简便方法计算
jacky
2024-06-17 11:25
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