Add and Subtract Mixed Numbers

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

1 3/7 and 7 1/7 have like units.

• True

• False

What should you do with mixed numbers when adding, subtracting, multiplying, or dividing?

• change them to improper fractions using TX

• reduce them

• flip them

• find common factors

• 4  1/5
• 4  14/15
• 3  9/15
• 3  14/15

• denominators.

• 4   19/5

• 4 5/10

• 4 19/25

• 4 5/10

• 4 5/10

• 4 19/25

• denominators.

• 4   19/5

• 4 5/10

• 4 19/25

• 4 5/10

• 4 5/10

• 4 19/25

-1 ⁷/₈ + (-3 ¹/₂)

• 5 ³/₈

• -5 ³/₈

• 1 ⁵/₈

• -1 ⁵/₈

Add the mixed numbers.

• 15 and 11/10

• 15 and 9/15

• 16 and 1/10

• 16 an 9/5

Solve

• 6

• -6

• 3 and 1/2

• -3 and 1/2