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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: bài 1. 5 1/3+2 2/5*1 1/9 bài 2. 9/4-y *5/6=1/2+2/3

Toán Lớp 5: bài 1. 5 1/3+2 2/5*1 1/9
bài 2. 9/4-y *5/6=1/2+2/3

Comments ( 2 )

  1. bài 1. 5 1/3+2 2/5 .1 1/9
           =16/3+12/5. 10/9
           =16/3+8/3
           =8
     —————
    bài 2. 9/4-y . 5/6=1/2+2/3
               9/4-y . 5/6=7/6
                      y . 5/6=9/4-7/6
                      y . 5/6=13/12
                      y        =13/12:5/6
                   y      =13/10

  2. Giải đáp + Lời giải và giải thích chi tiết:
    Bài 1.
    $5\dfrac{1}{3}+2\dfrac{2}{5} \times 1\dfrac{1}{9}$
    $=\dfrac{16}{3}+\dfrac{12}{5} \times \dfrac{10}{9}$
    $=\dfrac{16}{3}+\dfrac{8}{3}$
    $=8$
    Bài 2.
    $\dfrac{9}{4}-y \times \dfrac{5}{6}=\dfrac{1}{2}+\dfrac{2}{3}$
    $\dfrac{9}{4}-y \times \dfrac{5}{6}=\dfrac{7}{6}$
    $y \times \dfrac{5}{6}=\dfrac{9}{4}-\dfrac{7}{6}$
    $y \times \dfrac{5}{6}=\dfrac{13}{12}$
    $y= \dfrac{13}{12}:\dfrac{5}{6}$
    $y= \dfrac{13}{12} \times \dfrac{6}{5}$
    $y=\dfrac{13}{10}$

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222-9+11+12:2*14+14 = ? ( )

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