用简便方法计算57×101时,是根据
A:加法交换律 B 、乘法交换律 C 、乘法分配律 D 、乘法结合律
人气:101 ℃ 时间:2020-04-28 08:44:31
解答
C 、乘法分配律
57×57=57×(100+1)
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