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

Toán Lớp 3: tìm X X x 5=15 X+4=17 X-5=20 X:10=20

Toán Lớp 3: tìm X
X x 5=15
X+4=17
X-5=20
X:10=20

Comments ( 2 )

  1. a ] x × 5 = 15
         x        = 15 : 5
         x        = 3
    b ] x + 4 = 17
         x        = 17 – 4 
         x       = 13
    c ] x – 5 = 20
        x        = 20 + 5
       x         = 25
    d ] x : 10 = 20
         x         = 20 × 10
        x          = 200
     

  2. a,Xx5=15
    x=15:5
    x=3
    b,X+4=17
    x=17-4
    x=13
    c,X-5=20
    x=20+5
    x=25
    d,X:10=20
     x=20×10
    x=200

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

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