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Grade 8:  The Learning Equation Math

12.03 Adding Fractions with Unlike Denominators

Number Operations

Refresher pp 16-17

Learning Objectives:

The student will:

### Adding Proper/Improper Fractions with Unlike Denominators

1.  When the denominators are different determine the lowest common denominator (LCD).

2.  Change each fraction to an equivalent fraction with the LCD.

3.  Add the numerators together and place the sum over the LCD.

4.  Reduce to lowest terms (if necessary).

Compare Fractions

Equivalent Fractions Game

Integer Bars (Cusenaire Rods): Learning Fractions

Pattern Blocks: Exploring Fractions with Shapes

 Adding Fractions 1 Adding Fractions with Unlike Denominators Instructions   The addends must be entered before the Explain button works If you need help writing proper fractions, check out:  Identify Fractions. If you need help writing mixed numbers, check out:  Enter a Mixed Fraction You may enter the sum in fraction or mixed number form. In the above example, both 13/10 or 1 3/10 are acceptable. From Richard E. Rand's: VISUAL FRACTIONS

 Adding Fractions 2 Adding Fractions with Unlike Denominators Instructions The addends must be entered before the Explain button works If you need help writing proper fractions, check out:  Identify Fractions. If you need help writing mixed numbers, check out:  Enter a Mixed Fraction The sum must be written as a mixed number and in lowest terms. From Richard E. Rand's: VISUAL FRACTIONS

Fractions Drills - choose addition.  Try Level 2 first.

FunBrain.com's Soccer Shootout - choose addition (easy, medium, hard)

Enrichment:

Key Terms:

sum, numerator, denominator, unit fraction, proper fraction, improper fraction, mixed number, equivalent fractions, simplest terms, least common multiple (LCM), Least common denominator (LCD)

Multiples and Least Common Multiples - cool

## LCM Calculator

Enter the first and second valules, then click "Solve".

 First Value Second Value Least Common Multiple

Free JavaScripts provided
by The JavaScript Source

## LCM and GCD Calculator

Another calculator is available.

 Greatest Common Divisor (GCD) corresponds to Greatest Common Factor (GCF) source:  common.java

Lesson on Multiples and Least Common Multiples

Conversion of Fractions:  Grade 7 Lesson 11.05 - improper fractions

Conversion of Fractions:  Grade 7 Lesson 11.05 - mixed numbers

What is Fraction - Practice Game

 Instructions - Equivalent Proper Fractions From Richard E. Rand's: VISUAL FRACTIONS Equivalent Fractions

 Instructions - Mixed Numbers to Improper Fractions From Richard E. Rand's: VISUAL FRACTIONS

 Instructions - Improper Fractions to Mixed Numbers From Richard E. Rand's: VISUAL FRACTIONS

Equivalent Fractions Game