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22*16+44*21怎么简便计算?
人气:440 ℃ 时间:2020-05-10 18:27:44
解答
22×16+44×21
=(21+1)×16+44×21
=21×16+44×21+16×1
=21(16+44)+16
=21×60+16
=1260+16
=1276
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