-1 + `45/115` + `47/51` + `-9/23` + `-1/3` `-13/49`+`12/48`+`1/12`+`3/18` `13/15` + (`-4/5`+`7/18`)+`-5/12`+`1/36`

Bởi

-1 + `45/115` + `47/51` + `-9/23` + `-1/3`
`-13/49`+`12/48`+`1/12`+`3/18`
`13/15` + (`-4/5`+`7/18`)+`-5/12`+`1/36`

0 bình luận về “-1 + `45/115` + `47/51` + `-9/23` + `-1/3` `-13/49`+`12/48`+`1/12`+`3/18` `13/15` + (`-4/5`+`7/18`)+`-5/12`+`1/36`”

  1. Đáp án:

    `a,-1+45/115+47/51+ -9/23+ -1/3`

    `=-1+9/23+47/51+ -9/23+ -1/3`

    `=(-1+47/51-1/3)+(9/23 + -9/23)`

    `=-7/17`

    `b,-13/49+12/48+1/12+3/18`

    `=-13/49+1/4+1/12+3/18`

    `=-13/49+(1/4+1/12+3/18)`

    `=-13/49+1/2=23/98`

    `c,13/15+(-4/5 +7/18)+ – 5/12+1/36`

    `=13/15-4/5+7/18-5/12+1/36`

    `=(13/15-4/5)+(7/18-5/12+1/36)`

    `=1/15`

     

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  2. Đáp án:`↓` `↓` `↓`

    `-1+45/115+47/51+  -9/23+  -1/3`

    `=-1+9/23+47/51+  -9/23+   -1/3`

    `=(-1+47/51)+(-9/23+9/23)`

    `=-7/17`

    $\\$

    `-13/49+12/48+1/12+3/18`

    `=-13/49+1/4+1/12+1/6`

    `=-13/49+(1/4+1/12+1/6)`

    `=-13/49+1/2`

    `=23/98`

    $\\$

    `13/15+(  -4/5+7/18)+  -5/12+1/35`

    `=(13/15+  -4/5)+(7/18+ -5/12+1/36)`

    `=1/15+0`

    `=1/15`

    `XIN` `HAY` `NHẤT` `Ạ`

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