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

Toán Lớp 6: `Tìm\ x:` `a)\ x . 1000 = 1000` `b)\ x – 90 = 10` `c)\ x/10=10` `d)\ x-100=900`

Toán Lớp 6: Tìm\ x:
a)\ x . 1000 = 1000
b)\ x – 90 = 10
c)\ x/10=10
d)\ x-100=900

Comments ( 2 )

  1. a] x . 1000 =1000
    x = 1000 : 1000
    x = 1
    b]x -90 = 10
    x = 10 + 90
    x= 100
    c] x / 10 = 10
    x : 10 = 10
    x = 10 x 10
    x = 100
    d] x – 100 =900
    x = 900 + 100
    x = 1000
    cho mik xin ctlhn ạ

  2. a) x . 1000 = 1000
    ⇔ x       = 1000 : 1000
    ⇔ x       = 1
    b) x – 90 = 10
    ⇔ x = 10 + 90
    ⇔ x= 100
    c) $\dfrac{x}{10}$ = 10
    ⇔ x = 10 . 10 
    ⇔ x = 100
    d) x – 100 =900
    ⇔ x = 900 + 100
    ⇔ x = 1000

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

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