a)$\frac{5}{8}$ – ( – $\frac{2}{5}$ ) – $\frac{3}{10}$

Question

a)$\frac{5}{8}$ – ( – $\frac{2}{5}$ ) – $\frac{3}{10}$

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Calantha 10 months 2021-04-18T05:57:43+00:00 2 Answers 8 views 0

Answers ( )

    0
    2021-04-18T05:59:05+00:00

    Đáp án:

    `5/8-(-2/5)-3/10=29/40`

    Giải thích các bước giải:

    `a)`
    `5/8-(-2/5)-3/10`
    `=5/8+2/5-3/10`
    `=5/8+(2/5-3/10)`
    `=5/8+(4/10-3/10)`
    `=5/8+1/10`
    `=25/40+4/40`
    `=29/40`

    0
    2021-04-18T05:59:15+00:00

    Đáp án:

    ` 5/8 – ( – 2/5 ) – 3/10 `

    ` = 5/8 + 2/5 – 3/10 ` ( Đổi dấu )

    ` = 5/8 + ( 2/5 – 3/10 ) `

    ` = 5/8 + ( 4/10 – 3/10 ) `

    ` = 5/8 + 1/ 10 `

    ` = 25/40 + 4/ 40 `

    ` = 29/40 `

    @quynhchik852

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