`-3/4`+`1/6`+`-7/8` `-2/3`+`-1/3`:0,2+25% `-3/4`.`7/8`+1`1/2`+`-3/4`:`8/9`

Bởi

`-3/4`+`1/6`+`-7/8`
`-2/3`+`-1/3`:0,2+25%
`-3/4`.`7/8`+1`1/2`+`-3/4`:`8/9`

0 bình luận về “`-3/4`+`1/6`+`-7/8` `-2/3`+`-1/3`:0,2+25% `-3/4`.`7/8`+1`1/2`+`-3/4`:`8/9`”

  1. `1,`

    `-3/4 + 1/6 + (- 7/8)`

    `=-7/12 + (-7)/8`

    `=-35/24`

    `2,`

    `-2/3 +(-1/3) : 0,2 + 25%`

    `=-2/3 + (-5)/3 +1/4`

    `=-7/3 + 1/4`

    `=-29/15`

    `3,`

    `-3/4 . 7/8 + 1 1/2 + (-3/4) : 8/9`

    `=-21/32 + 3/2 + (-27/32)`

    `=-21/32 + (-27/32) + 3/2`

    `=-3/2 + 3/2`

    `=0`

    Bình luận

  2. `-3/4 + 1/6 + (-7)/8`

    `= -18/24 + 4/24 + (-21)/24`

    `= (4 – 18 – 21)/24 = -35/24`

    `-2/3 + (-1)/3 ÷ 0,2 + 25%`

    `= -2/3 – 1/3 ÷ 1/5 + 1/4`

    `= -2/3 – 5/3 + 1/4`

    `= (-2 – 5)/3 + 1/4`

    `= -7/3 + 1/4`

    `= 3/12 – 28/12 = -25/12`

    `-3/4 . 7/8 + 1 1/2 + (-3)/4 ÷ 8/9`

    `= -3/4 . 7/8 + 3/2 + (-3)/4 . 9/8`

    `= -3/4 (7/8 + 9/8) + 3/2`

    `= -3/4 . 2 + 3/2`

    `= -3/2 + 3/2 = 0`

    Bình luận

Viết một bình luận