# Surf for More Math

## CHAPTER 6: NUMBER TO 100

### Lesson 2: How Much Is 100?

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**

Create a skip-counting pattern with 100 objects.

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**Instructions for Use**

**Sequence Square** allows students to choose a starting number and the sequence step, and then count by 2s, 5s, and 10s. You can also use an interactive whiteboard with this activity.

To use Sequence Square, choose a starting number and the sequence step (make this 2, 5, or 10). Then click the Begin arrow. You will see number tiles for the sequence you set up. Click on the starting number and on the number you think is next. Continue until all the numbers have disappeared and the sequence is complete. Click Main to choose another sequence.

Try starting at 3 and counting by 2s, starting at 4 and counting by 5s, and starting at 6 and counting by 10s.

**Interactive Hundreds Chart** is an online hundreds chart that students can use to skip count by 2s, 5s, or 10s.

To use the Interactive Hundreds Chart, click on the colour you would like to use. Then decide if you want to skip count by 2s, 5s, or 10s. Click on a number to colour it, and then click on every number in your skip counting sequence.

**Skip Counting** allows students to go through several different activities in which they determine the missing numbers.

To use Skip Counting, read the definition of skip counting. Then try the example by clicking Go. Next, scroll down and select “Skip Counting by 2s to 100.” Click on the missing numbers and choose the correct answer from the four choices. A timer at the top right corner will show you how long it takes you the complete the activity. When you have completed the activity, you can click on New Game to play with a different chart, or you can go back to the main screen to select a different skip counting activity.