 Adding fractions with a common denominator

# Adding fractions with a common denominator

I can add simple fractions with common denominators.

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## General

Students learn to add simple fractions with common denominators.

## Common core standard(s)

CCSS.Math.Content.4.NF.B.3a..

## Relevance

Discuss with students that it is important to be able to add fractions with a common denominator, because you can then determine the total of the fractions together.

## Introduction

Show a few images on the interactive whiteboard. Ask students to determine which fraction would represent the given image.

## Development

To check that students are able to add simple fractions with common denominators, you can ask the following questions:
- What does it mean when fractions have a common denominator?
- What do you do when you add fractions with a common denominator?

## Guided practice

Students first practice adding fractions with a common denominator with visual support, then they are asked to drag the correct answer on the screen, and finally are given story problems to solve .

## Closing

Discuss with students that it is important to be able to add fractions with common denominators, so you can add fractions. Show a number of fractions on the interactive whiteboard and ask them to add the fractions. They must show the answer in the fraction-circle tool. Then ask students to form pairs and discuss which fractions have common denominators and then find their totals.

## Teaching tips

Students who have difficulty adding fractions with common denominators can practice with the terms "numerator" and "denominator". Remember that the denominator can be remembered as the "down"-ominator (so it belongs on the bottom). Then ask students to match fractions with a common denominator. Use images or visual support for this. Then practice adding the fractions with common denominators without visual support. 