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46×32+92×84和76×54+39×92怎样简便运算
人气:135 ℃ 时间:2020-04-14 09:08:39
解答
46×32+92×84
=46×32+(46+46)×84
=46×(32+84+84)
=46×200
=9200
76×54+39×92
=(39+39-2) ×54+39×92
=39×(54+54+92)-2×54
=39×200-108
=7800-108
=7692
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