Solution to

Rule for Addition of Two Negative Numbers

Frame 5-3.

+

(1) Change both numbers to absolute values.

8

+

5 + +3 = +5 + +3 =

(2) Add their absolute values.

+

5 + 3 = +8

(3) Place a negative symbol in front of the sum.

Add: 5 + 3

Answer _____________

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Solution to

Rule for Addition of a Positive Number and a Negative Number

Frame 5-4.

(1) Change both numbers to absolute values.

8

5 + 3 = 5 + 3 =

(2) Subtract the smaller absolute value from the larger

absolute value.

5 + 3 = 8

(3) Place the original sign of the larger absolute value in front

of the difference (remainder).

a. Add: +5 + 3

Answer _____________

b. Add: 5 + +3

Answer _____________

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Solution to

In exercise "a" above, did you notice that adding a "smaller" negative

Frame 5-5.

number to a positive number is much like subtracting a smaller positive

a. +2

number from a larger positive number?

+

5 + 3 =

Also, the answers to "a" and "b" had the same absolute value. The

difference is that the first problem resulted in a positive answer and the

+

+5 3 =

second resulted in a negative answer.

+

5 3 = +2

Remember: **Add **the absolute values if the signs of the two numbers are

b. 2

the same (both positive, both negative) and ____________ the absolute

values if the signs of the two numbers are not the same (one positive,

5 + +3 =

one negative).

5 +3 =

5 3 = 2

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MD0900

5-3

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