ADDING REAL NUMBERS Section 2.2.

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Presentation transcript:

ADDING REAL NUMBERS Section 2.2

Algebra tiles can be used to add or subtract integers. Remember integers are .

Example 1: = = = = Use algebra tiles to represent

Neutral pairs have a value of _____. zero =

A. Use algebra tiles to represent Example 2: A. Use algebra tiles to represent and then cross out any neutral pairs. + = =

= = B. Use algebra tiles to represent and then cross out any neutral pairs. = =

C. Use algebra tiles to represent and then cross out any neutral pairs.

= D. Use algebra tiles to represent and then cross out any neutral pairs. =

1 3 2 4 5 = E. Use algebra tiles to represent and then cross out any neutral pairs. 1 3 2 4 = 5 There are no neutral pairs

= F. Use algebra tiles to represent and then cross out any neutral pairs. = There are no neutral pairs

Rules For Adding Two Signed Numbers: A. Signs are the same – ______________________________________ 2.______________________________________ Add the numbers Take the given sign B. Signs are the different – ______________________________________ 2.______________________________________ Subtract the numbers Take the sign of the larger number

Example 3: Find each sum. A. Signs are different Signs are the same B. C. A. Signs are different Signs are the same Signs are different Try these… Find each sum. C. B. A.

Example 4: Find each sum. B. A. 1.2 C. D. -12.3

Try these… Find each sum. B. A. C. D.