Answer:

1. 5

2. -18

3. 2

4. 17/10

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Answer:

a 3

b18

c2

d17/10 =1.7

Step-by-step explanation:

-3+-4 =1+2 =3

-8+-10 =-18

-8--10 =-2

7/5+3/10 =17/10 =1.7