15) (- 137)- [(137+82)- 32] 16) 2 mũ 3 – 5 mũ 3 :5 mũ 2 +12.2 mũ 2 17) 100 + [ + 430 ] + 2145 + [ – 530 ]

1 bình luận về “15) (- 137)- [(137+82)- 32] 16) 2 mũ 3 – 5 mũ 3 :5 mũ 2 +12.2 mũ 2 17) 100 + [ + 430 ] + 2145 + [ – 530 ]”

1. 15) (-137) – [(137+82)-32]

   = -137 – (137 + 82) + 32

   = -137 – 137 – 82 + 32

   = -274 – 82 + 32

   = -356 + 32

   = -324

   —————————————————

   16) 2^3 – 5^3 : 5^2 + 12 . 2^2

   = 8 – 5 + 12 . 4

   = 3 + 48

   = 51

   —————————————————–

   17) 100 + (+430) + 2145 + (-530)

   = 100 + 430 + 2145 – 530

   = 2145 + 100 + (430-530)

   = 2145 + 100 – 100

   = 2145 

    

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