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

Toán Lớp 5: Nếu M/5 = 6/N = 0,6 thì M + N = ?

Toán Lớp 5: Nếu M/5 = 6/N = 0,6 thì M + N = ?

Comments ( 2 )

  1. M/5=6/N=0,6
    +)M/5=0,6=>M=3
    +)6/N=0,6
    =>6/N=3/5
    =>3N=6.5
    =>3.N=30
    =>N=30:3
    =>N=10
    Mà M+N=3+10=13
    Vậy M+N=13

  2. Answer
    $\text{Ta có:}$
    m/5 = 6/n = 0,6
    => $\begin{cases} m=5\times0,6\\n=0,6 \times x = 6 \end{cases}$
    => $\begin{cases} m=3\\n= 6 : 0,6 \end{cases}$
    => $\begin{cases} m=3\\n= 10 \end{cases}$
    $\text{Ta có:}$ m = 3 ; n = 10
    m + n
    = 3 + 10
    = 13
    $\text{Vậy}$ m + n = 13
     

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

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