Estimating Fractions Addition and Subtraction

Read the following phrases:
"about how much"
"approximately"
"what is the best estimate"
What are they asking you to do?

• add to find the answer

• estimate to find the answer

• add to find the answer

• multiply to find the answer

• benchmark fractions

• mixed numbers

• common denominators

• equivalent fractions

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

A​ (a)   is a number that is the denominator of two or more fractions.

• common denominator

• benchmark fraction

• mixed number

• equivalent fraction

What equation is shown here?

• 1/5 + 2/5 = 3/5

• 1/5 + 3/5 = 4/5

• 0 + 1/5 = 3/5

• 3/5 - 2/5 = 1/5

Tags

CCSS.4.NF.B.3A

What equation is shown?

• 3/10 + 3/10 = 6/10

• 6/10 - 3/10 = 3/10

• 3/10 + 6/10 = 9/10

• 0 + 3/10 = 6/10

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What is the sum of these fractions in lowest terms?

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What equation is shown here?

• 2/10 + 6/10 = 8/10

• 6/10 - 4/10 = 2/10

• 2/10 + 4/10 = 6/10

• 0+ 2/10 = 6/10

Tags

CCSS.4.NF.B.3A

Find the sum.

• 7/18

• 7/9

• 12/9

• 12/81

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the sum of these fractions in lowest terms?

• 7/18

• 7/9

• 12/9

• 12/81

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What equation is shown on the number line?

• 1/5 + 3/5 = 4/5

• 4/5 - 1/5 = 3/5

• 1/5 + 4/5 = 5/5

• 4/5 - 3/5 = 1/5

Tags

CCSS.4.NF.B.3A