Đáp án:
`a)` `=13/2`
`b)` `=25/2`
`c)` `=34/27`
`d)` `=1/9`
Giải thích các bước giải:
`a)` `5 5/27+7/23+0,5-5/27+16/23`
`=140/27+7/23+1/2-5/27+16/23`
`=(140/27-5/27)+(7/23+16/23)+1/2`
`=5+1+1/2`
`=13/2`
`b)` `35 1/6:(-4/5)-45 1/6:(-4/5)`
`=211/6.(-5/4)-271/6.(-5/4)`
`=(211/6-271/6).(-5/4)`
`=(-10).(-5/4)`
`=25/2`
`c)` `4/9:(-1/7)+6 5/9 .(2/3)`
`=4/9 .(-7)+59/9 . 2/3`
`=-28/9+118/27`
`=34/27`
`d)` `(-1/3)^2 . 4/11 +7/11 .(-1/3)^2`
`=1/9 . 4/11+7/11 . 1/9`
`=1/9 . (4/11+7/11)`
`=1/9`
