Answer:
170 - 40 + (-50) + 5 + (-20)
= 170 - 40 - 50 + 5 - 20
= (170 + 5) + (- 40 - 50 - 20)
= 175 + (-110)
= 175 - 110
= 65
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Answer:
170 - 40 + (-50) + 5 + (-20)
= 170 - 40 - 50 + 5 - 20
= (170 + 5) + (- 40 - 50 - 20)
= 175 + (-110)
= 175 - 110
= 65