“四分之三减七分之二加四分之一加七分之五”的简便运算怎么算?

请列式,谢谢!
2024-12-03 05:37:27
推荐回答(3个)
回答1:

四分之三减七分之二加四分之一加七分之五
=(3/4)-(2/7)+(1/4)-(5/7)
=(3/4)+(1/4)-(2/7)-(5/7)
=[(3/4)+(1/4)]-[(2/7)+(5/7)]
=1-1
=0

回答2:

3/4-2/7+1/4+5/7
=(3/4+1/4)+(5/7-2/7)
=1+3/7
=10/7

回答3:

3/4-2/7+1/4+5/7=(3/4+1/4)+(5/7-2/7)=1+3/7