Section 5 2 Adding and Subtracting Decimals Adding

Section 5. 2 Adding and Subtracting Decimals

Adding Decimals • Steps 1. Line up the numbers using the decimal vertically. 2. If needed add zeros for place holders. 3. Starting from the far right number, add • If it is a double digit carry the tens number over. 4. Carry the decimal down

Example • Simplify 734. 89 + 640. 56

Example • Simplify 27. 125 + 52. 54 + 2. 3

Subtracting Decimals • Steps 1. Line up the numbers using the decimal vertically. 2. If needed add zeros for place holders. 3. Starting from the far right number, subtract • If the top # is smaller than the bottom #, borrow. 4. Carry the decimal down

Example • Simplify 78. 894 – 12. 125

Example • Simplify 100 – 0. 526

Example • Simplify 8. 53 – 17. 84

Like Terms Blending and Evaluate

Example • Simplify -8. 61 + 4. 23 y – 2. 36 – 0. 76 y

Example • Simplify -16. 5 + 12. 68 + 25. 4 – 46. 789

Example • Is 7 a solution to x + 2. 7 = 9. 3 ?

Example • Is -11. 4 a solution to 27. 4 + y = 16?

Word Problem • Phillip bought a car part for $18. 26. If he paid with two $10 bills, what was his change?

Word Problem • In 2010, the average credit card late fee was $35. In 2011, the average credit card late fee had decreased by about $11. 85. Find the average credit card late fee in 2011.