Unit 2 Day 5: Adding & Subtracting Fractions

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Unit 2: Understanding Fractions

Day 5: Putting Pieces Together

Today's Objectives

Vocabulary Focus

Like Denominators: When two or more fractions have the same bottom number.

The Golden Rule

You can only add or subtract fractions if the denominators are the same!

If they are the same, you add/subtract the numerators and keep the denominator the same.

I Do: Adding Fractions

Let's solve \(\frac{2}{8} + \frac{3}{8}\).

\(\frac{\color{#ef4444}{2}}{8}\)

+

\(\frac{\color{#3b82f6}{3}}{8}\)

=

\(\frac{\color{#ef4444}{2}+\color{#3b82f6}{3}}{8}\)

=

\(\frac{5}{8}\)

I Do: Subtracting Fractions

Let's solve \(\frac{7}{10} - \frac{4}{10}\).

\(\frac{7}{10}\)

-

\(\frac{4}{10}\)

=

\(\frac{7-4}{10}\)

=

\(\frac{3}{10}\)

(Start with 7 blue squares, then take away 4)

We Do: Let's Try Together

Let's solve \(\frac{4}{9} + \frac{2}{9}\).

We add the numerators: 4 + 2 = ___?

The denominator stays the same, so the answer is ___?

We Do: Let's Try Together

Let's solve \(\frac{5}{6} - \frac{1}{6}\).

We subtract the numerators: 5 - 1 = ___?

The denominator stays the same, so the answer is ___?

You Do: Practice Time!

Work on the problems on your notes sheet.

Problem 1:

Solve the problem.

\(\frac{8}{12} - \frac{3}{12} = ?\)

Problem 2:

Solve the problem.

\(\frac{1}{5} + \frac{3}{5} = ?\)

Independent Practice

Try these problems on your own.

Green Level

Solve: \(\frac{1}{3} + \frac{1}{3}\)

Yellow Level

Solve: \(\frac{9}{10} - \frac{6}{10}\)

Red Level

You ran \(\frac{3}{8}\) of a mile and walked \(\frac{4}{8}\) of a mile. What is the total distance?

Exit Ticket

On a piece of paper, solve: \(\frac{6}{7} - \frac{2}{7}\)

Unit 2: Understanding Fractions

Day 5: Putting Pieces Together

Today's Objectives

Vocabulary Focus

Like Denominators: When two or more fractions have the .

I Do: Adding Fractions

Let's solve \(\frac{2}{8} + \frac{3}{8}\). We add the numerators: 2 + 3 = . The answer is .

I Do: Subtracting Fractions

Let's solve \(\frac{7}{10} - \frac{4}{10}\). We subtract the numerators: 7 - 4 = . The answer is .

We Do: Let's Try Together

Problem 1: Let's solve \(\frac{4}{9} + \frac{2}{9}\).

We add the numerators: 4 + 2 = .

The denominator stays the same, so the answer is .

Problem 2: Let's solve \(\frac{5}{6} - \frac{1}{6}\).

We subtract the numerators: 5 - 1 = .

The denominator stays the same, so the answer is .

You Do: Practice Time!

Problem 1: Solve: \(\frac{8}{12} - \frac{3}{12} = \)

Problem 2: Solve: \(\frac{1}{5} + \frac{3}{5} = \)

Independent Practice

Green: Solve: \(\frac{1}{3} + \frac{1}{3} = \)

Yellow: Solve: \(\frac{9}{10} - \frac{6}{10} = \)

Red: You ran \(\frac{3}{8}\) of a mile and walked \(\frac{4}{8}\) of a mile. What is the total distance?

Exit Ticket

On a piece of paper, solve: \(\frac{6}{7} - \frac{2}{7}\)