Question

ans this question with step I will make u as a brainlist
find the sum:
1. -8 +-7=
2 . 3+5=
3. -3 + 2 =
4. -8 +-5=
4. 7 + 7 =
5. 6 + -1 =
6. 10+ 0 =
7. 5-5=
8. -10-(-6)=
9. 13-(-6)=
10. -16-(-12)=
11. 18-(-2)=
12. -15 +16=
13. 19 + (-15)=
14. -20+15=
15. 15-(-4)=
16. -10 + (-10) =
17. -13-(-10)=
18. -6-(-20) =
19. 18+ (-17)=
20. -17-(-20)=​​

Answer 1

Step-by-step explanation:

-15

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Answer 2

First of all, let me tell you the basic operations we use.

(a) (+) (+) = (+)

(b) (+) (-) = (-)

(c) (-) (+) = (-)

(d) (-) (-) = (+)

Remember, I'll use these rules to find answer.

Answers :-

(1) -8 + (-7) = -8 -7 = -15

(2) 3 + 5 = 8

(3) -3 + 2 = -1

(4) -8 + (-5) = -8 -5 = -13

(5) 6 + (-1) = 6 - 1 = 5

(6) 10 + 0 = 10

(7) 5 - 5 = 0

(8) -10 - (-6) = -10 + 6 = -4

(9) 13 - (-6) = 13 + 6 = 19

(10) -16 - (-12) = -16 + 12 = -4

(11) 18 - (-2) = 18 + 2 = 20

(12) -15 + 16 = 1

(13) 19 + (-15) = 19 - 15 = 4

(14) -20 + 15 = -5

(15) 15 - (-4) = 15 + 4 = 19

(16) -10 + (-10) = -10 - 10 = -20

(17) -13 - (-10) = -13 + 10 = -3

(18) -6 - (-20) = -6 + 20 = 14

(19) 18 + (-17) = 18 - 17 = 1

(20) -17 - (-20) = -17 + 20 = 3