63乘62/61用简便计算;了.

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63乘62/61用简便计算;了.

63乘62/61用简便计算;了.
63乘62/61用简便计算
;了.

63乘62/61用简便计算;了.
63*(61+1)/61
=(63*61+63)/61
=(63*61+61+2)/61
=64+2/61

63乘62/61
=63*62/61
=63*(61+1)/61
=63+63/61
=63+1+2/61
=64+2/61
=64又2/61

(61+2)*(62/61)=61*(62/61)+2*(62/61)=62+2*(61+1)/61=62+2+1/61=64+1/61貌似是这样!

63×62÷61
=(61+2)×(61+1)÷61
=[61×61+61×(2+1)+2×1]÷61
=61+3+2/61
=64+2/61