Đáp án:
`a)` `93/40`
`b)` `9/10`
Giải thích các bước giải:
`a)` `4/5÷2/3+3/4÷2/3`
`C1:`
`4/5÷2/3+3/4÷2/3`
`=4/5×3/2+3/4×3/2`
`=6/5+9/8`
`=93/40`
`C2:`
`4/5÷2/3+3/4÷2/3`
`=4/5×3/2+3/4×3/2`
`=(4/5+3/4)×3/2`
`=31/20×3/2`
`=93/40`
-------------------------
`b)` `7/3×3/5-5/6×3/5`
`C1:`
`7/3×3/5-5/6×3/5`
`=7/5-1/2`
`=9/10`
`C2:`
`7/3×3/5-5/6×3/5`
`=(7/3-5/6)×3/5`
`=3/2×3/5`
`=9/10`
