-2/13 x 5/17 + -2/13 x 12/17 + 5/13

2 bình luận về “-2/13 x 5/17 + -2/13 x 12/17 + 5/13”

1. -2/13 xx 5/17 + (-2)/13 xx12/17 + 5/13

   = -2/13 xx ( 5/17 + 12/17) + 5/13

   = -2/13 xx 1 + 5/13

   = -2/13 + 5/13

   = 3/13

   —–

   @ Áp dụng :

   a xx b +axx c = a xx ( b +c)

   Trả lời
2. -2/13*5/17+-2/13*12/17+5/13

   = -2/13(5/17+12/17)+5/13

   = -2/13*(12+5)/17+5/13

   = -2/13*1+5/12

   = -2/13+5/12

   = 5/12-2/13

   = (5-2)/13

   = 3/13

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   Trả lời