3⼀5-1⼀4+2⼀5-3⼀4 简便计算(写过程)

2024-12-30 15:53:05
推荐回答(4个)
回答1:

此题主要运用:括号前面是减号时,添加括号或者去掉括号,括号里面的符号都变号。
3/5-1/4+2/5-3/4
=(3/5+2/5)-(1/4+3/4)
=1-1
=0

回答2:

=(3/5+2/5)-(1/4+3/4)
=1-1
=0

回答3:

(3/5+2/5)-(1/4+3/4)
=1-1
=0

回答4:

3/5-1/4+2/5-3/4
=(3/5+2/5)-(1/4+3/4)
=1-1
=0