Question

- 15 + 31 + - 21 + 62 + - 57​

Answer 1

$- 15 + 31 + ( - 21) + 62 + ( - 57) \\ = - 15 + 31 - 21 + 62 - 57 \\ = - 15 + 10 + 5 \\ = - 15 + 15 \\ = 0$

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Answer 2

−15+31+(−21)+62+(−57)
=−15+31−21+62−57
=−15+10+5
=−15+15
=0​



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