简算拖式(5/7+1/27)乘以7+20/27
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简算拖式(5/7+1/27)乘以7+20/27
简算拖式
(5/7+1/27)乘以7+20/27
简算拖式(5/7+1/27)乘以7+20/27
(5/7+1/27)×7+20/27
=(5/7)×7+(1/27)×7+20/27
=5+7/27+20/27
=5+1
=6
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简算拖式(5/7+1/27)乘以7+20/27
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