Solution to

You have reviewed how to add, subtract, multiply, and divide positive

Frame 5-1.

numbers in the preceding lessons. This lesson will give you rules for

adding, subtracting, multiplying, and dividing when negative numbers are

negative

involved.

right

One concept that is helpful when working with negative numbers is

"absolute value." Absolute value pertains to the numerical value of a

figure without regard to whether it is a positive or negative number. Using

the number line, it is the number's distance from zero without regard

whether it is to the right or left of the zero. Another way of think of

absolute value is that positive numbers stay positive and negative

numbers become positive. The symbol for absolute value is two parallel

lines with the number between the lines.

The absolute value of negative eight can be written as -8 .

If you add the absolute values of two numbers, you add the values of the

numbers without regard to whether the numbers are positive or negative.

For example

2 + 3 = +2 + +3 = +2 + 3 = 2 + +3 = 5

The absolute value of negative five ( 5 ) is the same as the

absolute value of ____________________________ .

_______________________________________________________________________________________

Solution to

Rule for Addition of Two Positive Numbers

Frame 5-2.

positive five ( +5 )

(1) Change both numbers to absolute values.

(2) Add their absolute values

(3) Place a positive symbol (or no symbol) in front of

the sum.

Add: +5 +

+

3

Answer _____________

_______________________________________________________________________________________

MD0900

5-2

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