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58问答库 > 用简便方法计算。四分之三加二十八分之十五减四分之一减二十八分之一十九分

用简便方法计算。四分之三加二十八分之十五减四分之一减二十八分之一十九分

2025-04-07 07:36:29

推荐回答（2个）

回答（1）：

解: 3/4+15/28-1/4-1/28
=(3/4-1/4)+(15/28-1/28)
=2/4+(14/28)
=0.5+0.5
=1

11/19+7/18+8/19-1/18
=(11/19+8/19)+(7/18-1/18)
=19/19+(6/18)
=1+(1/3)
=4/3

回答（2）：

4分之3-28分之15-4分之1-28分之1
=4分之3-4分之1-28分之15-28分之1
=(4分之3-4分之1)-(28分之15-28分之1)
=4分之2-28分之16
=-28分之2
=-14分之1

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