# Adding, subtracting, multiplying negative and positive numbers

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

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

#### Solution Preview

Dear student,

Please find the answers below.

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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.

find the domain, Multiply, Add or subtract radicals

1. Find the domain of each square root. f (x)=square root 8-2x

2. Multiply and simplify assume that all variables in a radicand represent positive real numbers no radicands involve negative quantities raised to even powers. Here is the problem square root 5xy times square root 10xy2.

3. Add or subtract as indicated. Here is the problem 5 square root 12 + square root 75

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