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

Toán Lớp 5: Tìm x biết: x/6=10/15 A. x = 3 B. x = 5 C. x = 2 D. x = 4

Toán Lớp 5: Tìm x biết: x/6=10/15
A.

x = 3
B.

x = 5
C.

x = 2
D.

x = 4

Comments ( 2 )

  1. $\text{$\dfrac{x}{6}$ = $\dfrac{10}{15}$ }$
    $\text{⇒ x × 15 = 6 × 10}$
    $\text{⇒ 15x = 60}$
    $\text{⇒ x = 60 : 15 }$
    $\text{⇒ x = 4}$
    $\text{Vậy chọn D.x = 4}$
     

  2. Tìm x biết: x/6=10/15
    X x 15 = 6 x 10
    15x = 60
    x = 60 : 15
    x = 4
    ⇒ chọn câu D

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