Add Integers with same and different signs.pptx

Year 7 Adding Integers

1. Adding Integers

2. Students will solve problems adding integers. Lesson Goal

3. To add two integers with the same sign, you can use a horizontal or vertical number line . The equation is modeled on the horizontal number line. Start at zero. Move left three units to model the negative integer . Then move left four more units to model adding the negative integer . The sum is .   Learn Add Integers with the Same Sign

4. The equation is modeled on the vertical number line. Start at zero. Move down five units to model the negative integer . Then move down four more units to model the negative integer . The sum is . The number lines illustrate the rules for adding two integers with the same sign. To add two integers with the same sign, add their absolute values. The sum is: positive if both integers are positive negative if both integers are negative   Learn Add Integers with the Same Sign

5. Example 1 Add Integers with the Same Sign Find .  

6. Example 1 Add Integers with the Same Sign Check Find the sum of .  

7. Example 2 Add Integers with the Same Sign Check   A contestant on a game show has points. He loses another points. What is his new score?  

8. To add two integers with different signs, you can use a horizontal or vertical number line. The horizontal number line models the equation . Start at zero. Move right five units to model the positive integer 5. Then move left three units to model adding the negative integer . The sum is .   Learn Add Integers with Different Signs Predict how you can use a vertical number line to add the integers. Turn the page to check your prediction.

9. The vertical number line models the equation . Start at zero. Move down seven units to model the negative integer . Then move up one unit to model the positive integer . The sum is .   Learn Add Integers with Different Signs

10. Example 4 Add Integers with Different Signs Find .  

11. Example 4 Add Integers with Different Signs Check Find