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

Toán Lớp 6: Bài 4: Tính nhanh a) 74. 27 + 27 . 30 – 27. 4 b) 2.31.24 + 8.6.42 + 16.27.3 c) 26.48 + 48. 152 – 48. 78 d) 26. 256 + 56.256 – 82.156 e)

Toán Lớp 6: Bài 4: Tính nhanh
a) 74. 27 + 27 . 30 – 27. 4
b) 2.31.24 + 8.6.42 + 16.27.3
c) 26.48 + 48. 152 – 48. 78
d) 26. 256 + 56.256 – 82.156
e) 32. 54 + 32. 46 – 50

Comments ( 2 )

  1. a) 74. 27 + 27 . 30 – 27. 4
    = (74+30-4).27
    = 100.27
    = 2700
    b) 2.31.24 + 8.6.42 + 16.27.3
    = (2.24).31+(8.6).42+(3.16).27
    = 48.31+48.42+48.27
    =(31+42+27).48
    = 100.48
    = 4800
    c) 26.48 + 48. 152 – 48. 78
    = (26+152-78).48
    = 100.48
    = 4800
    d) 26. 256 + 56.256 – 82.256
    = (26+56-82).256
    = 0.256
    = 0
    e) 32. 54 + 32. 46 – 50
    = 32.(54+46)-50
    = 32.100-50
    = 3200-50
    = 3150

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

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