Surf for More Math

Lesson 5 - Describing How a Set Changed

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

Goals

Solve missing-part problems.

Relate addition to subtraction.

Instructions for Use

Little Animals Activity Centre, Addition and Subtraction lets students solve missing-part addition and subtraction problems.

To use Little Animals Activity Centre, Addition and Subtraction, count the spots on the back of the ladybugs in the equation. Click on the ladybug that has the number that completes the sum.

Relating Addition to Subtraction lets students relate addition to subtraction.

To use Relating Addition to Subtraction, click the "Start" button and read the equation in the first text field. Look at the second equation and click on the number that completes the equation.