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8×49+49×61+49的简便方法？

2025-04-03 03:08:23

推荐回答（4个）

回答1：

简便计算方法如下：

8×49+49×61+49

=8×49+49×61+49×1

=（8+61+1）×49

=70×（50-1）

=70×50-70×1

=3500-70

=3430

回答2：

把49看做49x1
那么8x49+49x61+49
可整理为：
8x49+61x49+1x49
根据乘法运算规律可得：
（8+61+1）x49
＝70x49
＝3430

回答3：

原式=(8+61+1)×49
=70×49
=3430.

回答4：

8×49+49×61+49的简便方法。
解：8×49+49×61+49
=（8+61+1）x49
=70x49
=70x（50-1）
=70x50-70
=3500-70
=3430
答：答案为3430。

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