98+68×49用简便算法怎么算?

日期:2022-04-03 08:40:21 人气:1

98+68×49用简便算法怎么算?

98+68×49
=98+(34×2)×49
=98+34×98
=(34+1)×98
=35×(100-2)
=35×100-35×2
=3500-70
=3430
望采纳O(∩_∩)O
    A+
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