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

Toán Lớp 7: tính: a)13/25+6/41-38/25+35/41-1/2 nhanh lên

Toán Lớp 7: tính:
a)13/25+6/41-38/25+35/41-1/2
nhanh lên

Comments ( 2 )

  1.  13/25 + 6/41 – 38/25 + 35/41 – 1/2
    = ( 13/25 – 38/25 ) + ( 6/41 + 35/41 ) – 1/2
    = -25/25 + 41/41 – 1/2
    = -1 + 1 – 1/2
    = 0 – 1/2 = – 1/2
     

  2. 13/25+6/41-38/25+35/41-1/2
    = (13/25 – 38/25) + (6/41 + 35/41) – 1/2
    = -25/25 + 41/41 -1/2
    = -1 + 1 – 1/2
    = 0 – 1/2
    = -1/2

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