(a) 25+ (-35)-(-85)
(b) 45-(+65)+ (75)
(c) 9o+(-85) + 90
(d) -105+ (-120)-(-135)​

1 thought on “(a) 25+ (-35)-(-85)<br />(b) 45-(+65)+ (75)<br />(c) 9o+(-85) + 90<br />(d) -105+ (-120)-(-135)​”

1. Step-by-step explanation:

   a)

   [tex]25 + ( – 35) – ( – 85) \\ = 25 – 35 + 85 \\ = 25 + 50 \\ = 75[/tex]

   b)

   [tex]45 – ( + 65) + (75) \\ = 45 – 65 + 75 \\ = 45 + 10 \\ = 55[/tex]

   c)

   [tex]90 + ( – 85) + 90 \\ = 90 – 85 + 90 \\ = 15 + 90 \\ = 105[/tex]

   d)

   [tex] – 105 + ( – 120) – ( – 135) \\ = – 105 – 120 + 135 \\ = – 105 + 15 \\ = – 90[/tex]

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