Adding Subtracting Multiplying Fractions Like Denominators

When adding or subtracting fractions, you -

• use our 4-box method

• only add/subtract numerators & add/subtract denominators

• keep change flip

• do not need to find common denominators

When adding or subtracting fractions, I must always have a (a)   . I then add or subtract the ​ (b)   and keep ​ (c)   the same.

• Common Denominator

• Numerators

• Denominator

• Common Numerators

• Divisor

• Dividend

What must you do when adding or subtracting fractions

• Keep the first number, flip the second number, and change the sign

• Add or subtract straight across

• Change mixed numbers to improper fractions

• Find a common denominator

What operations do you have to get a common denominator to solve? (Choose all that apply.)

• Adding

• Subtracting

• Multiplying

• Dividing

What is the sum of these fractions in lowest terms?

• 4/5

• 3/20

• 17/20

• 4/20

If you were to add \frac{1}{6}+\frac{2}{3} What is the least common denominator you would use to solve it?

• 3

• 6

• 9

• 12

Fill in the blank to the essential question (from adding and subtracting fractions notes):

"How can I use _______________ fractions to add and subtract fractions?"

• similar

• common

• like

• equivalent

When do you need to find a common denominator?

• Only in adding fractions

• Only in subtracting fractions

• When multiplying or dividing fractions

• When adding or subtracting fractions

What is the LCD?

• Lowest Common Denominator

• Least Common Denominator

• Lesser Comparable Denominator

• Least Compatible Denominator

Mrs. Estrada planted a flower garden, as shown below. After the first 2 weeks, 5/8 of the flowers started to bloom. After another week, 1/4 of the flowers started to bloom. What fraction of Mrs. Estrada's garden started to bloom?

• 7/8

• 6/7

• 3/8

• 1/7