9.86×0.54 +0.46的简便运算
2个回答
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两种方法：
●9.86×0.54+0.46
=(10-0.14)×(0.5+0.04)+0.46
=5-0.07+0.4-0.0056+0.46
=5.4-0.0756+0.46
=5.86-0.0756
=5.7844
●9.86×0.54+0.46
=4.93×2×0.54+0.46
=4.93×1.08+0.46
=(5-0.07)×1.08+0.46
=5.4-0.0756+0.46
=5.86-0.0756
=5.7844
●9.86×0.54+0.46
=(10-0.14)×(0.5+0.04)+0.46
=5-0.07+0.4-0.0056+0.46
=5.4-0.0756+0.46
=5.86-0.0756
=5.7844
●9.86×0.54+0.46
=4.93×2×0.54+0.46
=4.93×1.08+0.46
=(5-0.07)×1.08+0.46
=5.4-0.0756+0.46
=5.86-0.0756
=5.7844
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