6- 5 1/3 +3 1/3 7/12 – 3 1/5+1 5/12+ 4 1/5

Question

6- 5 1/3 +3 1/3
7/12 – 3 1/5+1 5/12+ 4 1/5

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Samantha 2 tháng 2021-07-19T10:53:47+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-07-19T10:55:11+00:00

    Đáp án:

    `a)2 2/3.`

    `b)3.`

    Giải thích các bước giải:

    `a)6-5 1/3+3 1/3.`

    `=18/3-16/3+10/3.`

    `=(18-16+10)/3.`

    `=8/3.`

    `=2 2/3.`

    `b)7/12-3 1/5+1 5/12+4 1/5.`

    `=7/12-16/5+17/12+21/5.`

    `=(7/12+17/12)+(-16/5+21/5).`

    `=(7+17)/12+(-16+21)/5.`

    `=24/12+5/5.`

    `=2+1.`

    `=3.`

    0
    2021-07-19T10:55:31+00:00

    `\text{Đáp án:}`

    `a)` $\dfrac{8}{3}$

    `b)` `3`

    `\text{Giải thích các bước giải:}`

    `a)` `6` – `5`$\dfrac{1}{3}$ + `3`$\dfrac{1}{3}$

    = $\dfrac{18}{3}$ – $\dfrac{16}{3}$ + $\dfrac{10}{3}$

    = $\dfrac{8}{3}$

    `b)` $\dfrac{7}{12}$ – `3`$\dfrac{1}{5}$ + `1`$\dfrac{5}{2}$ + `4`$\dfrac{1}{5}$

    = $\dfrac{7}{12}$ – $\dfrac{16}{5}$ + $\dfrac{17}{12}$ + $\dfrac{21}{5}$

    =  $\dfrac{7}{12}$ + $\dfrac{-16}{5}$ + $\dfrac{17}{12}$ + $\dfrac{21}{5}$

    = `(`$\dfrac{7}{12}$ + $\dfrac{17}{12}$`)` + `(`$\dfrac{-16}{5}$ + $\dfrac{21}{5}$`)`

    = $\dfrac{24}{12}$ + $\dfrac{5}{5}$

    = `2` +`1`

    = `3`

    `\text{#Chúc bạn học tốt!}`

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