TÍNH 7/9+9/10 7/8­-5/6 5/8-2/5 1/5:7/8 7/9✖️4/5 9/4✖️17/5

Bởi

TÍNH
7/9+9/10
7/8­-5/6
5/8-2/5
1/5:7/8
7/9✖️4/5
9/4✖️17/5

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  1. `7/9 + 9/10`

    `= 70/90 + 81/90`

    `= 151/90`

    `7/8 – 5/6`

    `= 42/48 – 40/48`

    `= 1/24`

    `5/8 – 2/5`

    `= 25/40 – 16/40`

    `= 9/40`

    `1/5 : 7/8`

    `= 1/5 xx 8/7`

    `=8/35`

    `7/9 xx 4/5`

    `= 28/45`

    `9/4 xx 17/5`

    `= 153/20`

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  2. 7/9 + 9/10 = 70/90 + 81/90 = 151/90

    7/8 – 5/6 = 21/24 – 20/24 = 1/24

    5/8 – 2/5 = 25/40 – 16/40 = 9/40

    1/5 : 7/8 = 1/5 x 8/7 = 8/21

    7/9 x 4/5 = 28/45

    9/4 x 17/5 = 153/20

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