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

Toán Lớp 6: 5.22-18:32 ; 70-5:(x-3)=45 giúp em với,cảm ơn nhé!

Toán Lớp 6: 5.22-18:32 ; 70-5:(x-3)=45 giúp em với,cảm ơn nhé!

Comments ( 2 )

  1. B1: $5.22 – \frac{18}{32} = 110 – \frac{9}{16} = \frac{1760-9}{16} = \frac{1751}{16}$
    B2: 70 – 5:(x-3)=45
    ⇔$5:(x-3) = 70-45$
    ⇔$5:(x-3) = 25$
    ⇔$x-3 = \frac{5}{25}$
    ⇔$x-3=\frac{1}{5}$
    ⇔$x = \frac{1}{5} + 3$
    ⇔ $x =\frac{16}{5}$

  2. 5.22-18: 32
    =110-9/16
    =1760-9/16
    =1751/16
    70-5:(x-3)=45
    5:(x-3)=70-45
    5:(x-3)=25
    x-3=5:25
    x-3=5/25=1/5
    x-3=1/5
    x=1/5+3
    x=16/5
     

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

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