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数学
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9.99*22.2+33.3*3.34
要简便方法和详细过程,列梯等式,还有在网上看到了好多6.66,都是这样,就是不知道怎么来的,
人气:403 ℃ 时间:2019-12-07 03:17:42
解答
9.99*22.2+33.3*3.34
=(33.3×0.3)×22.2 +33.3×3.34
=33.3×(0.3×22.2) +33.3×3.34
=33.3×6.66+33.3×3.34
=33.3×(6.66+3.34)
=33.3×10
=333
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