# Surf for More Math

## CHAPTER 6: NUMBER TO 100

### Lesson 7: Representing a Number in Different Ways

Use these interactive activities to encourage students to have fun on the Web while learning about numbers up to 100. Students can try these activities on their own or in pairs.

**Goal**

Represent two-digit numbers in a variety of ways.

[C, CN, V]

**Instructions for Use**

**Base Ten Game** has students determine the 2-digit number represented by the base ten blocks.

To use Base Ten Game, click on the Let Me Try tab. Then, click on Grade 2 and Grade 3. Click on Try the Game. Enter the 2-digit number represented by the base ten blocks and click Done. Next, use the tens rod icon and the unit cube to show two different representations of the same number. Drag the tens rods and the unit cubes into the work area and click Done. The blocks move to the boxes on the left to show the different representations.

**Numbers to 100** allows students to practise expressing tens as ones.

To use Numbers to 100, click Start. Enter the number of tens that is represented by the blocks and enter the number of ones that is represented by the blocks. Click Check. If you are correct, click the arrow to move to the next number. If you are incorrect, correct your answer and click Check.

**Place Value** has students work through different activities related to place value and 2-digit numbers.

To use Place Value, select Lesson 5.1, 5.2, 5.3, 5.4, 5.5, or 5.6. Follow the instructions for each lesson. Once you have completed an activity, click on Unit 2: Numbers Through 100 to get back to the lesson listing.