# Surf for More Math

## Chapter 9: Number to 100

**Lesson 5: Missing Numbers **

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

**Goal**

Identify missing numbers on a 100 chart.

[C, ME, PS, R]

**Instructions for Use**

**Give the Dog a Bone** is an interactive 100 chart that you can use to prompt students to identify the missing numbers.

Click “Begin.” Then click on the squares of the 100 chart to reveal the numbers. Click on some squares of the 100 chart, but leave others blank. Then figure out what the missing numbers are.