Adding and Subtracting Fractions with Unlike Denominators

Solve.

• 5/9

• 1 4/9

• 1 1/6

• 7/9

Q1. What is the ratio of 14 to 16?

• 14/16

• 7/8

• 8/7

• 4/10

What is the Least Common Denominator(LCD) of 2/3 + 1/2?

• 2

• 3

• 6

• 12

When I add or subtract fractions I must have _________ units.

• denominator

• numerator

• like

• unlike

USE SCRATCH PAPER AND SOLVE THIS WORD PROBLEM:

The classroom made cookies. They used 1 1/4 cups of white flour for the chocolate chip cookies. They used 2 1/3 cups of flour for peanut butter cookis. How much flour did they use in total?

• 3 2/7 cups

• 3 7/12 cups

• 1 1/12 cups

• 1 2/7 cups

What is the Least Common Denominator of 1/5 + 2/10

• 5

• 10

• 50

• 15

Sally ran 1/3 of a mile and swam 5/6 of a mile. In simplest form, how much farther did she swim than she ran?

• 1/2

• 5/18

• 4/3

• 3/6

Robert made a fruit salad with 11/12 of a pound of melon and 1/6 of a pound of berries. How many pounds of fruit did Robert use in all?

• 1 1/12

• 3/4

• 2/3

• 1 1/2

USE SCRATCH PAPER AND SOLVE THIS MULTI-STEP PROBLEM: The 5th and 6th Grade Center served pizza on Tuesday. First Lunch Shift ate 2/5 of the pizzas. Second Lunch Shift ate 3/10 of the pizzas. How much pizza was remaining for Third Lunch Shift?

• 3/5

• 15/50

• 5/15

• 2/50

Find equivalent fractions and common denominators for the problem shown above.

• 1/10 and 4/10

• 5/10 and 4/10

• 1/20 and 2/20

• 5/10 and 2/10