用简便方法计算下面各题.43.6+9.8+6.4; 7.3×0.25×8; 2.31×1.5+1....
答案:1 悬赏:70 手机版
解决时间 2021-02-02 12:05
- 提问者网友:精神病院里
- 2021-02-01 18:34
用简便方法计算下面各题.43.6+9.8+6.4; 7.3×0.25×8; 2.31×1.5+1....
最佳答案
- 五星知识达人网友:渡鹤影
- 2021-02-01 19:57
①43.6+9.8+6.4
=(43.6+6.4)+9.8
=50+9.8
=59.8;
②7.3×0.25×8
=7.3×(0.25×8)
=7.3×2
=14.6;
③2.31×1.5+1.5×7.69
=(2.31+7.69)×1.5
=10×1.5
=15.
=(43.6+6.4)+9.8
=50+9.8
=59.8;
②7.3×0.25×8
=7.3×(0.25×8)
=7.3×2
=14.6;
③2.31×1.5+1.5×7.69
=(2.31+7.69)×1.5
=10×1.5
=15.
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