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Surf for More Math

Lesson 7 - Communicating about Estimation Strategies


To encourage students to have fun on the Web while learning about Communicating about Estimation Strategies, here are some games and interactive activities they can do on their own or in pairs.


Explain how to estimate sums and differences of fractions and mixed numbers.

Builds Upon

Student Book pages 330-332

Instructions for Use

Estimating Sums and Differences of Fractions allows students to use concrete materials to model fractions.

To use Estimating Sums and Differences of Fractions, click on a shape and drag it into the workspace. Select a shape by clicking on it. Once selected, the shape can be moved to any location on the workspace. Click on the tools on the top panel to select and drag, rotate, find more information about the shape, or to clear the workspace. To remove a shape, drag it to the recycling bin.

Have students find how many triangles can fit inside the hexagon. Have students manipulate other shapes to create other fractions.