2-7分之4+9分之2-7分之3脱式计算要简算

2025-01-31 02:04:03
推荐回答(2个)
回答1:

2-4/7+2/9-3/7=2-(4/7+3/7)+2/9=2-1+2/9=1+2/9=1又2/9

回答2:

2-4/7+2/9-3/7
=2-(4/7+3/7)+2/9
=2-1+2/9
=1+2/9
=1又2/9