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Adding, subtracting, multiplying negative and positive numbers

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Need help to verify if the answers are correct. I get really confused with this stuff. Sometimes I can't remember the correct sign to use(positive or negative). Please provide step by step instructions so that I am able to better understand how to solve the problems.

Find the sum:
1. -2 + (-3) = -5
2. 8 - 7 + = 5
3. 8 + (-5) = 3
4. 15 + (-3) = 12
5. -16 + 8 = -8
6. 7 + (-10) = 3
7. -9 + (-5) = -14
8. -12 +14 = 2

Find each difference.
9. 9 - 26 = 17
10. -4 - 15 = 19
11. 21 - (-7) = 28
12. 27 - (-16) = 43
13. -16 - (-43) = -59
14. 47 - 19 = 28
15. -156 - 98 = 254
16. -192 - 47 = 239
17. 0 - (-51) = -51
18. -63 - 89 = -23
19. -12 - (-21) = -33
20. 92 - (-16) = -76

Find each product or quotient.
21. -36/9 = -4
22, -52/-4 = +13
23. (-5) * (-20 ) = -100
24. -63/-9 = 7
25. (-15) * (2) = 30
26. 22/-2 = -11
27. (13) * (-6) = -78
28. -100/-5 = 20
29. (-60) * (-3) = 180
30. -240/30 = -8
31. (43) * (-8) = -344
32. -169/-13 = 13

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https://brainmass.com/math/basic-algebra/basics-adding-subtracting-multiplying-negative-and-positive-numbers-591800

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Dear student,

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Find the sum:

Some things to remember while adding positive and negative numbers --
a. Performing a sum on a positive number and a negative number is simply a subtraction where you subtract negative number from positive.
b. Performing a sum on 2 negative numbers is simply an addition of those 2 numbers and then putting a negative sign in front of them.

1. -2 + (-3) = -5 --> Use the principle (b) from above. (add negative numbers and just put a - in front)
2. 8 - 7 + = 5 --> Is this 8 - 7 or what ? Please message me, and I'll let you know the answer.
3. 8 + (-5) = 3 --> Use the principle (a) from above. (subtract negative number from positive 8 - 5 )
4. 15 + ...

Solution Summary

The attached solution contains basic instructions to perform simple operations on negative numbers. The solution specifically outlines how to perform a multiplication, summation, division, and addition on equations involving positive and negative numbers. For every operation set of examples are also provided to cover all the cases.

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