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

Toán Lớp 2: Bài 1: Tìm x a)15xX=30 b)40+x=50 c)x-5=20

Toán Lớp 2: Bài 1: Tìm x
a)15xX=30
b)40+x=50
c)x-5=20

Comments ( 2 )

  1. a, 15.x=30
    ⇒x=30:15
    ⇒x=2
    Vậy x=2
    b, 40+x=50
    ⇒x=50-40
    ⇒x=10
    Vậy x=10
    c, x-5=20
    ⇒x=20+5
    ⇒x=25
    Vậy x=25

  2. Bài 1:
    a) 15 x x = 30
    x = 30 : 15
    x = 2
    b) 40 + x = 50
    x = 50 – 40
    x = 10
    c) x – 5 = 20
    x = 20 + 5
    x = 25

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

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