a) -1/3-(-0,5)+(3/-4) b)-5/7.0,2-6,12:0,3 c)(2/3-1)+1/5:(-1,2) 01/09/2021 Bởi Adalynn a) -1/3-(-0,5)+(3/-4) b)-5/7.0,2-6,12:0,3 c)(2/3-1)+1/5:(-1,2)
Đáp án: `a) -1/3-(-0,5)+(3/-4)` `=-1/3+1/2-3/4` `=-4/12+6/12-9/12` `=-7/12``b)-5/{7}.0,2-6,12:0,3` `=-5/7.{1}/5-102/5` `=-1/7-102/5` `=-719/35``c)(2/3-1)+1/5:(-1,2)` `=-1/3-2/5` `=-11/5` Bình luận
a)$-\frac{1}{3}$ `-(-0,5)`+ ($\frac{3}{-4}$ ) = `-1/3 + 1/2 – 3/4` `= -4/12 + 6/12 – 9/12` = $\frac{-4+6-9}{12}$ `= -7/12` `b) -5/7 . 0,2-6,12:0,3` `= -5/7 . 1/5 – 102/5` `= -1/7 – 102/5` `= -5/35 – 714/35` = $\frac{-5-714}{35}$ `= -719/35` `c) (2/3-1)+1/5:(-1,2)` `= -1/3 + -2/5` `= -5/15 – 6/15` =$\frac{-5-6}{15}$ `= -11/15` Bình luận
Đáp án:
`a) -1/3-(-0,5)+(3/-4)`
`=-1/3+1/2-3/4`
`=-4/12+6/12-9/12`
`=-7/12`
`b)-5/{7}.0,2-6,12:0,3`
`=-5/7.{1}/5-102/5`
`=-1/7-102/5`
`=-719/35`
`c)(2/3-1)+1/5:(-1,2)`
`=-1/3-2/5`
`=-11/5`
a)$-\frac{1}{3}$ `-(-0,5)`+ ($\frac{3}{-4}$ )
= `-1/3 + 1/2 – 3/4`
`= -4/12 + 6/12 – 9/12`
= $\frac{-4+6-9}{12}$
`= -7/12`
`b) -5/7 . 0,2-6,12:0,3`
`= -5/7 . 1/5 – 102/5`
`= -1/7 – 102/5`
`= -5/35 – 714/35`
= $\frac{-5-714}{35}$
`= -719/35`
`c) (2/3-1)+1/5:(-1,2)`
`= -1/3 + -2/5`
`= -5/15 – 6/15`
=$\frac{-5-6}{15}$
`= -11/15`