56×34+56×64怎样简便计算
56×34+56×64怎样简便计算
56×34+56×64
=56x(34+64)
=56x98
=56x(100-2)
=56x100-56x2
=5600-112
=5488追问
56×34+56×64
=56x(34+64)
=56x98
=56x(100-2)
=56x100-56x2
=5600-112
=5488追问
这也不简便啊
追答您好,这是最简便方法
用了分配律和结合律
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