Adding and subtracting rational numbers with same and different signs

ADDING RATIONAL NUMBER WITH SAME AND DEIFFERENT SIGNS

1. ADDING AND SUBTRACTING RATIONAL NUMBERS

2. REVIEW: Use the following emojis to answer each expression. 2 3 4

3. + 8 4 = -4

4. - 1.5 3 = 4.5 3

5. + 6.3 4 = -2.3

6. + 5/2 2 = -1/2

7. - 5/2 2 = 1/2 + 4

8. Adding Rational Numbers with the same signs

9. 2.5 + 1.5 = Examples 2 . 5 + 1 . 5 4 . 0 1 -3.75 + (-2.25) = -3 . 75 + - 2 . 25 -6 . 00 1 1

10. 1.) 3 + 1 1 2 Your turn! -2.5 + (-4 ) 1 2 3.26 + 1.57 2.) 3.) 4.) -3.36 + (-8.7)

11. What’s new? Observe the given expressions below , What is the operation used? What are the signs of the rational numbers? What do you think is our new lesson? -2.5 + 1.5 =

12. Adding Rational Numbers with the different signs

13. How to Add Rational Numbers with different signs Step 1. Subtract the smaller absolute value to the larger absolute value . Step 2. Keep the sign of the number with larger absolute vale.

14. -2.5 + 1.5 = Examples -2 . 5 + 1 . 5 -1 . 0 3.75 + (-2.25) = 1.5 3 . 75 + -2 . 25 1 . 50

15. 1.) -3 + 1 1 2 Your turn! -2.5 + (4 ) 1 2 3.26 + (-1.57) 2.) 3.) 4.) -3.36 + 8.7