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

Toán Lớp 4: tính nhanh 2763 x 99 + 2763 – 2763

Toán Lớp 4: tính nhanh 2763 x 99 + 2763 – 2763

Comments ( 2 )

  1. 2763 xx 99 + 2763 – 2763
    = 2763 xx 99 + 2763 xx 1 – 2763 xx 1
    = 2763 xx ( 99 + 1 – 1)
    = 2763 xx 99
    = 2763 xx ( 100 – 1)
    = 2763 xx 100 – 2763 xx 1
    = 276300 – 2763
    =273 537
    #caty09

  2. @dark
    tính nhanh
    2763 x 99 + 2763 – 2763
    = (2763 x 99) + (2763 – 2763)
    = 273537 + 0
    = 273537
     

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