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数学
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89+11×49简便运算
人气:432 ℃ 时间:2020-03-27 08:59:36
解答
89+11×49
=89+10x49+1x49
=490+89+49
=490+100-11+50-1
=650-12
=638
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另外发并点击我的头像向我求助,请谅解,=490+100-11+50-1=650-12算错了结果是62889+11×49=89+10x49+1x49=490+89+49=490+100-11+50-1=640-12=628
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