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100×98⼀99用简便方法计算？

2025-03-16 03:20:22

推荐回答（4个）

回答1：

简便方法的核心就是找到共同点，先算简单的。
100x98/99
=（99+1）x（99-1）/99
=（99^2-1）/99
=99^2÷99-1/99
=99-1/99
=98又98/99

回答2：

100×98/99
=（100×99/99）-（100×1/99）
=100×1-（100×1/99）
=100 -（100×1/99）
≈100 - 1.01
≈98.99

回答3：

100×98/99
=（99+1）X98/99
=99X98/99+1X98/99
=98+98/99
=98又98/99

回答4：

100×100=0

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