Question

69/67×31怎么样简便运算？

Answer 1

69/67×31=2139/67
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Answer 2

= (67+2)/67×31
= (1+2/67)×31
= 31 + 2×31/67
= 31又62/67

Answer 3

67/69x31
=67/(69/31)
=67/3

Answer 4

67*31+31*32+31

Answer 5

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