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

Toán Lớp 6: (-3/11+3/8):6/5-(8/11+11/8):6/5 Tính nhanh

Toán Lớp 6: (-3/11+3/8):6/5-(8/11+11/8):6/5
Tính nhanh

Comments ( 2 )

  1. ( (-3)/11 + 3/8 ) : 6/5 – (8/11 + 11/8 ) : 6/5
    = [ ( (-3)/11 + 3/8 ) – ( 8/11 + 11/8 ) ] : 6/5
    = ( 9/88 – 185/88 ) : 6/5
    = -2 : 6/5
    = (-5)/3
    @ Rin gửi
     

  2. ( -3/11+ 3/8) : 6/5 – ( 8/11 + 11/8) : 6/5
    =( -3/11+ 3/8) . 5/6 -( 8/11 + 11/8) . 5/6
    =[( -3/11+ 3/8) -( 8/11 + 11/8)] . 5/6
    = (-3/11 + 3/8 – 8/11 – 11/8) . 5/6
    = [ (-3/11 – 8/11) + ( 3/8 – 11/8)] . 5/6
    = [ (-1) + (-1)] . 5/6
    = -2 . 5/6
    = -5/3
    #caty09

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