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

Toán Lớp 7: Tính nhanh: 8.64.7+4.33.14+56.3

Toán Lớp 7: Tính nhanh: 8.64.7+4.33.14+56.3

Comments ( 2 )

  1. 8.64.7 + 4.33.14 + 56.3
    = 56.64 + 56.33 + 56.3
    = 56. (64 + 33 + 3)
    = 56 . 100
    = 5600

  2. 8 . 64 . 7 + 4 . 33 . 14 + 56 . 3
    = 8 . 7 . 64 + 14 . 4 . 33 + 56 . 3
    = 56 . 64 + 56 . 33 + 56 . 3
    = 56 . ( 64 + 33 + 3 )
    = 56 . 100
    = 5600
     

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

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