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

Toán Lớp 5: Tìm y : c ) 1 – ( 1,1 + y ) : 8 1/10 = 0

Toán Lớp 5: Tìm y :
c ) 1 – ( 1,1 + y ) : 8 1/10 = 0

Comments ( 2 )

  1. Giải đáp + giải thích các bước giải:
    1 – ( 1,1 + y ) : 81/10 = 0
    ⇔ 1 – ( 1,1 + y ) : 81/10 = 0
    ⇔ 1 – ( 1,1 + y ) x 10/81 = 0
    ⇔ ( 1,1 + y ) x 10/81 = 1 – 0
    ⇔ ( 1,1 + y ) x 10/81 = 1
    ⇔ 1,1 + y = 1 : 10/81
    ⇔ 1,1 + y = 81/10
    ⇔ y = 81/10 – 1,1
    ⇔ y = 7

  2. $\text{c) 1 – (1,1 + y) : 8$\dfrac{1}{10}$ = 0}$
    $\text{→ (1,1 + y) : 8$\dfrac{1}{10}$ = 1 – 0}$
    $\text{→ (1,1 + y) : $\dfrac{81}{10}$ = 1 }$
    $\text{→ 1,1 + y = 1 × $\dfrac{81}{10}$ }$
    $\text{→ $\dfrac{11}{10}$ + y =$\dfrac{81}{10}$ }$
    $\text{→ y = $\dfrac{81}{10}$ – $\dfrac{11}{10}$ }$
    $\text{→ y = $\dfrac{70}{10}$ }$
    $\text{→ y = 7}$
    $\text{Vậy y = 7}$

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