L8-2 Notes: Adding Integers

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Presentation transcript:

L8-2 Notes: Adding Integers Chapter 8 L8-2 Notes: Adding Integers

Adding Integers with the Same Signs To add integers with the same signs, add the numbers and keep the same sign. 1. +3 + (+2) = 2. (-2) + (-4) =

On Your Own… Add. Use counters if necessary. 1. +1 + (+4) 2. (-3) + (-4) 3. (-7) + (-4)

Add Integers with Different Signs To add two integers with different signs, subtract the numbers and keep the sign of the bigger number.

Add Integers with Different Signs Find 1 + (-5). Find -8 + 6.

On Your Own… Add. Use counters if necessary. 1. 7 + (-3) 2. 4 + (-4) 1. 7 + (-3) 2. 4 + (-4) 3. -6 + 3

L8-3 Notes: Subtracting Integers Chapter 8 L8-3 Notes: Subtracting Integers

Subtracting Positive Integers To subtract an integer, add its opposite.

Examples Subtract. 1. 6 – 4 = 2. 5 – 2 = 3. 9 – 6 =

Subtracting Integers using Zero Pairs Find -2 – 3.

Examples Subtract. 1. -8 – 3 = 2. -2 – 5 = 3. -9 – 5 =

Subtract Negative Integers Find -5 – (-3).

Examples Subtract. 1. -8 – (-2) = 2. -6 – (-1) = 3. -5 – (-4) =