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  • 14-09-2017
  • Mathematics
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(-3)+(-7)+(-11)-(-21)+(-3)-(-1)

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choixongdong
choixongdong choixongdong
  • 14-09-2017
(-3)+(-7)+(-11)-(-21)+(-3)-(-1)
= 
(-3)+(-7)+(-11) + 21 +(-3) + 1
= 22 + (-24)
= -2

hope it helps
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