-2/7 .0,56 +(-2/7 ).6,44 +21 (-1/2 +(-1/3)² :|2| – (-2/3)

2 bình luận về “-2/7 .0,56 +(-2/7 ).6,44 +21 (-1/2 +(-1/3)² :|2| – (-2/3)”

1. #wdr

   -2/7 .0,56 +(-2/7).6,44 +21

   = -2/7. (0,56 + 6,44)+21

   = -2/7 .7 +21

   = -2 +21

   = 19

   —

   (-1/2) + (-1/3)^2 :|2| -(-2/3)

   = -1/2 + 1/9 : 2 +2/3

   = -1/2 + 1/18 + 2/3

   = -9/18 + 1/18 + 12/18

   = 4/18

   = 2/9

   Trả lời
2. -2/7 . 0,56 + (-2/7) . 6,44 + 21

   = -2/7 . (0,56 + 6,44) + 21

    = -2/7. 7 + 21

   = -2 + 21

   = 19

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   -1/2 + (-1/3)^2 : | 2 | – (-2/3)

   = -1/2 + 1/9 : 2 + 2/3

   = -1/2 + 1/9 xx 1/2 + 2/3

   = -1/2 + 1/18 + 2/3

   = -9/18 + 1/18 + 12/18

   = 4/18

   = 2/9

   text{#maingoctranthi}

   Trả lời