Adding and Subtracting Fraction Equations

Which of the following number sentences is equal to 4  1/4?

• 2  3/4 + 1  2/4

• 3 1/4 + 1  1/4

• 2  1/2  + 2  1/2

• 8 1/4 - 4  1/4

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Which important factor should be present to add or subtract fractions?

• Denominators should be the same.

• Numerators should be different.

• Numerators should be the same.

• Denominators should be different.

Answer explanation

Remember, before we can add or subtract fractions, the fractions need to have a common denominator.

In other words, the denominators must be the same.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

You must find the (a) _______ before you can add or subtract fractions with unlike denominators.

• Multiple

• Common denominator

• Common numerator

• Simplified Fraction

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Answer explanation

Since the denominators are the same, we could simply focus on only adding the numerators to obtain our answer.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Could these 2 fractions be added ?

• Yes, they could be added together because the pies are being split into the same portions. ( Denominator is the same).

• No, they couldn’t be added because their numerators are different.

• No, since it’s the concept of unlike fractions.

Tags

CCSS.4.NF.A.2

Can these 2 fractions be added? Explain your reason.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

You can add the numerators of fractions straight across when the denominators are the same.

• True

• False

Tags

CCSS.7.NS.A.1C