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8X49+8简便运算

2025-03-15 10:30:50

推荐回答（3个）

回答1：

解:8X49+8
=8X(49+1)
=8X50
=400

回答2：

8X49+8
=8×（49+1）
=8×50
=400

回答3：

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
8×49+8
= 8× ( 49+1)
= 8×50
= 400

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