简便计算(-3⼀7)+(+1⼀5)+(+2⼀7)+(-1⼀5) (-3⼀5+1⼀5

简便计算(-3/7)+(+1/5)+(+2/7)+(-1/5) (-3/5+1/5)+(-4/5)
2024-12-18 16:37:01
推荐回答(1个)
回答1:

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

(-3/5+1/5)+(-4/5)=-6/5