2 câu trả lời
Đáp án: 1/72
Giải thích các bước giải: 1/3-3/4-(-3/4)+1/72-2/9-1/36+1/35
=1/3-3/4+3/5+1/72-2/9-1/36+1/15
=(1/3+3/5+1/15)-(3/4+2/9+1/36)+1/72
=1-1+1/72
=1/72
`1/3-3/4-(-3/4)+1/72-2/9-1/36+1/35`
`=1/3-3/4+3/5+1/72-2/9-1/36+1/15`
`=(1/3+3/5+1/15)-(3/4+2/9+1/36)+1/72`
`=1-1+1/72`
`=1/72`
