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

Toán Lớp 4: 2 × x + x × 8 = 2010 181 x X + X x 81 = 2100

Toán Lớp 4: 2 × x + x × 8 = 2010
181 x X + X x 81 = 2100

Comments ( 2 )

  1. 2 × x + x × 8 = 2010
    ⇒ ( 2 + 8 ) × x = 2010
    ⇒ 10 × x = 2010
    ⇒ x = 2010 : 10
    ⇒ x = 201
    ——
    181 × x + x × 81 = 2100
    ⇒ ( 181 + 81 ) × x = 2100
    ⇒ 262 × x = 2100
    ⇒ x = 2100 : 262
    ⇒ x = ≈ 8
    #$Gin :333$

  2. 2xx x + x xx8=2010
    => (2+8)xx x=2010
    => 10 xx x=2010
    => 2010:10
    => 201
    Vậy x=201
    ________________
    181 xx x + x xx 81=1096
    => (181+81)xx x=1096
    => 262 xx x=1096
    => 1096:262
    => xâp xỉ 8
    Vậy x= xấp xỉ 8
     

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

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