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58问答库 > 64ᠧ199+64用简便方法怎么算？

64ᠧ199+64用简便方法怎么算？

2025-04-03 01:53:15

推荐回答（2个）

回答（1）：

=64×（199+1）
=64×200
=12800

回答（2）：

乘法分配律为：两个数的和与一个数相乘，先将它们与这个数分别相乘，再相加，积不变．即：（a+b）×c=a×c+b×c．反过来则：a×c+b×c=（a+b）×c
64×199+64
= 64× ( 199+1)
= 64×200
= 12800

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