## CHAPTER 2: FRACTIONS

**Lesson 7: Adding and Subtracting Fractions with Number Lines **

Use these interactive activities to encourage students to have fun on the Web while learning about fractions. Students can try these activities on their own or in pairs.

**Goal**

Add and subtract fractions using a pictorial model.

**Builds Upon**

Student Book pages 70–73

**Instructions for Use**

**Add Unlike Fractions** allows students to add unlike fractions by first changing them into equivalent fractions.

To use Add Unlike Fractions, scroll down to read the instructions and then scroll up and click on “Start” to see the first addend. Type the fraction in the “Numerator”, and “Denominator” boxes at upper right and click “OK”. If correct, a second addend is displayed below the first and the fraction for the first addend appears. Type the second fraction in the 2 upper right boxes and click “OK” to see it appear below to the right of the first, followed by an “=” sign. Now type the sum in the 2 upper right boxes and click “OK”. If right, “Sum is correct!” is displayed. Incorrect values at any stage will bring up an error message prompting you to re-enter the correct values. To begin a new game, click on “New Example”. To see the correct way to add the fractions, click on “Explain”. To view your score and print a report card, click on “Report”.

** Add Unlike Fractions with Circles** lets students practise adding unlike fractions using circles as pictorial models.

To use Add Unlike Fractions with Circles, scroll down to read the instructions and then scroll up and click on “Start” to see the first addend. Type the fraction in the “Numerator”, and “Denominator” boxes at upper right and click “OK”. If correct, a second addend is displayed below the first and the fraction for the first addend appears. Type the second fraction in the 2 upper right boxes and click “OK” to see it appear below to the right of the first, followed by an “=” sign. Now type the sum in the 2 upper right boxes and click “OK”. If right, “Sum is correct!” is displayed. Incorrect values at any stage will bring up an error message prompting you to re-enter the correct values. To begin a new game, click on “New Example”. To see the correct way to add the fractions, click on “Explain”. To view your score and print a report card, click on “Report”.