Mastering Addition and Subtraction of Fractions

Mr. G teaches how to add and subtract fractions with common denominators. He explains the concept of denominators and numerators, emphasizing that the denominator remains unchanged during addition or subtraction. Using pizza slices as a visual aid, he demonstrates the process of combining and separating fractions. The video encourages practice and reassures students of their ability to learn.

What is the denominator in a fraction?

• The number of shaded parts

• The total number of parts

• The number downstairs

• The number upstairs

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

When adding fractions with the same denominator, what stays the same?

• The fraction

• The numerator

• The denominator

• The whole number

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

In the fraction 1/3, what does the numerator represent?

• The whole number

• The number downstairs

• The number of shaded parts

• The total number of parts

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

If you add 1/4 and 2/4, what is the result?

• 3/4

• 2/4

• 1/4

• 4/4

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Why do we divide a pizza into four parts when the denominator is 4?

• Because the denominator tells us to

• Because the numerator tells us to

• Because we want four slices

• Because we have four pizzas

Tags

CCSS.1.G.A.3

What is the first step when subtracting fractions with the same denominator?

• Change the denominators

• Add the numerators

• Subtract the numerators

• Check if the denominators are equal

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

If you have 3/4 of a pizza and a friend eats 2/4, how much pizza is left?

• 2/4

• 3/4

• 1/4

• 4/4

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

In the fraction 3/4, what does the numerator represent?

• The whole number

• The number downstairs

• The number of shaded parts

• The total number of parts

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

When subtracting 2/3 - 1/3, what is the result?

• 2/3

• 1/3

• 3/3

• 0/3

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What remains unchanged when adding or subtracting fractions with the same denominator?

• The whole number

• The denominator

• The fraction

• The numerator

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D