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

Toán Lớp 4: Bài 4 : Tìm x a. ( x + 268) x 137 = 48498 b. ( x + 3217) : 215 = 348 c. ( x – 2048) : 145 = 246 d. (2043 – x) x 84 = 132552

Toán Lớp 4: Bài 4 : Tìm x
a. ( x + 268) x 137 = 48498
b. ( x + 3217) : 215 = 348
c. ( x – 2048) : 145 = 246
d. (2043 – x) x 84 = 132552

Comments ( 2 )

  1. a)  ( x + 268 ) xx 137 = 48498
                x + 268 = 48498 : 137
                 x + 268 = 354
                           x = 354 – 268
                           x = 86
    b)   ( x + 3217 ) : 215 = 348
              x + 3217 = 348 xx 215
              x + 3217 = 74820
                          x = 74820 – 3217
                          x = 71603
    c)  ( x – 2048 ) : 145 = 246
            x – 2048 = 246 xx 145
            x – 2048 = 35670
                       x = 35670 + 2048
                       x = 37718
    d)  ( 2043 – x ) xx 84 = 132552
                 2043 –  x = 132552 : 84
                  2043 – x = 1578
                             x = 2043 – 1578
                             x = 465
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  2. a)( x + 268) xx 137 = 48498
    x+268=48498:137
    x+268=354
    x=354-268
    x=86
    b)( x + 3217) : 215 = 348
    x+3217=348xx215
    x+3217=74820
    x=74820-3217
    x=71603
    c)( x – 2048) : 145 = 246
    x-2048=546xx145
    x-2048=81780
    x=81780-2048
    x=79732
    d)(2043 – x) xx 84 = 132552
    2043-x=132552:84
    2043-x=1578
    x=2043-1578
    x=465
     

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

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