Question

用简便方法解析61+59乘以61？

Answer 1

这道题可利用结合律进行简便计算，
61十59x61二61（1十59）
二61x60二360

Answer 2

61+59×61

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=61×(1+59)

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=61×60

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=3660

Answer 3

（61+59）×61=（60+1+60-1）×61=120×61=120×60+120=7200+120=7320

Answer 4

61+59×61=（1+59）×61=60×61=60×（60+1）=3600+60=3660。

Answer 5

(60+1)+(60-1)]x61=[60+1+60-1]x61=120x61