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

Toán Lớp 4: (1+2+3+4+5+6+7+8+9)×(65_(56+9)

Toán Lớp 4: (1+2+3+4+5+6+7+8+9)×(65_(56+9)

Comments ( 2 )

  1. (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9) xx [65 – (56 + 9)]
    = [(1 +9) + (2 + 8) + (3 + 7) + ( 4 + 6) + 5] xx (65 – 65)
    = (40 + 5) xx 0
    = 45 xx 0
    = 0

  2. (1+2+3+4+5+6+7+8+9)×(65-(56+9) = 45 x 0 = 0
     
     

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

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