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ADDING REAL NUMBERS Section 2.2

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**Algebra tiles can be used to add or subtract integers.**

Remember integers are .

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

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**Neutral pairs have a value of _____.**

zero =

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**A. Use algebra tiles to represent**

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

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**= = B. Use algebra tiles to represent**

and then cross out any neutral pairs. = =

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**C. Use algebra tiles to represent**

and then cross out any neutral pairs.

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**= D. Use algebra tiles to represent**

and then cross out any neutral pairs. =

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**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

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**= F. Use algebra tiles to represent**

and then cross out any neutral pairs. = There are no neutral pairs

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**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

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**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.

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

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**Try these… Find each sum.**

B. A. C. D.

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Adding Integers Section 2.2. 6543210-2-3-4-5-6 2 To Add Two Numbers with the Same Sign 2 + 3 = 2 Start End - 2 + (- 3) = - 2- 2 - 3- 3 StartEnd 3 6543210-2-3-4-5-66543210-2-3-4-5-6.

Adding Integers Section 2.2. 6543210-2-3-4-5-6 2 To Add Two Numbers with the Same Sign 2 + 3 = 2 Start End - 2 + (- 3) = - 2- 2 - 3- 3 StartEnd 3 6543210-2-3-4-5-66543210-2-3-4-5-6.

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