1. Notes 7.2B Decimal Operations

2. *Line the decimals up! EX: 2.345 + 13.41 Answer: 15.755
Adding Decimals
*Line the decimals up! EX: Answer:
Rewrite:

3. *Line up the decimals! EX: 11.428 + 8.67 Answer: 2.758
Subtracting Decimals
*Line up the decimals! EX: Answer: 2.758
Rewrite:

4. Multiplying Decimals Rewrite:
*Put the number with most digits on top and line up LAST numbers Move the decimal back at the end EX: x 13.4 Answer:
Rewrite:

5. Dividing Decimals Rewrite:
*Kick the ball to the wall Do the same in the hall & Throw it on the roof EX: 25.7 ÷ 3.1 Answer: 8.290
Rewrite:

6. 7.2B Fraction Operations

7. *we must first find a COMMON DENOMINATOR
Adding Fractions
*we must first find a COMMON DENOMINATOR
Then add the numerators
EX:
2 ¾ + 5 ½
Rewrite (w/ common denominators):

8. Subtracting Fractions
*we must first find a COMMON DENOMINATOR
Then subtract the numerators
EX:
4 1/3 - 3 ½
Rewrite (w/ common denominators):

9. Multiplying Fractions
Multiply numerator times numerator to get our numerator
And multiply denominator times denominator to get our denominator

10. Mixed Numbers:
Need to make an improper fraction then multiply 1 3 2 3 2 X 1 3 8 3 8 9 = X
Improper Fraction – bigger numerator than denominator

11. = = Dividing Fractions 1 3 2 5 1 3 5 2 ÷ X 5 6
If dividing fractions Keep the first fraction Flip the second (reciprocal) and Change the sign (KFC) 1 3 2 5 1 3 5 2 = ÷ X
reciprocal = 5 6

12. Dividing Mixed Numbers:1 4 1 3 2 ÷ = 1 4 7 3 = ÷ 1 4 3 7 3 28 = X

13. Practice Questions
On your own sheet of notebook paper please complete the following problems: p 293 #20-28 (odds) p 304 #39-47(odds) p 316 #15-19(odds), 21-25(odds)

14. Book Practice
On a separate sheet of paper please do the following questions in your book: (and please show your work) Page 137 #25-30 Page 150 #26-30 Page 713 #16-20