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阿Q吧 > 三点6×31点4 34点3×7点二,怎么简便运算？

三点6×31点4 34点3×7点二,怎么简便运算？

2025-03-16 15:49:06

推荐回答（2个）

回答1：

3.6×31.4+34.3×7.2
=(3.6×2)×(31.4÷2)+7.2×34.3
=7.2×15.7+7.2×34.3
=7.2×(15.7+34.2)
=7.2×50
=(7.2÷2)×(50×2)
=3.6×100
=360

回答2：

3.6×31.4+34.3×7.2
=3.6×31.4÷（34.3×2）×3.6
=3.6×（31.4+68.6）
=3.6×100
=360

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