Question

59乘58分之7加57乘58分之5简便方法

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Answer 1

59*7/58+57*5/58
=(58+1)*7/58+(58-1)*5/58
=58*7/58+1*7/58+58*5/58-1*5/58
=7+7/58+5-5/58
=12+2/58
=12+1/29

Answer 2

=(58+1)乘58分之7+(58-1)乘58分之5
=7+58分之7+5-58分之5
=12-29分之1

Answer 3

59*7/58+57*5/58
=59/58*7+57/58*5
=7+7/58+5-5/58
=12+1/29

Answer 4

59*7/58+57*5/58
=(58+1)*7/58+(58-1)*5/58
=58*7/58+1*7/58+58*5/58-1*5/58
=7+7/58+5-5/58
=12+2/58
=12+1/29

Answer 5

59*7/58+57*5/58
=(58+1)*7/58+(58-1)*5/58
=58*7/58+1*7/58+58*5/58-1*5/58
=12+1/29