# Surf for More Math

## Chapter 3: Introducing Addition and Subtraction

**Lesson 4: Focus on Visualizing: Numbers on a 10-Frame **

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

**Goals**

Visualize addition combinations for 10.

Informally explore missing-addend situations.

[C, CN, ME, V]

**Instructions for Use**

**Using 10-Frames--How Many** allows students to visualize addition using a 10-Frame.

To play Using 10-Frames, look at the question at the top of the screen.

The questions asks either how many counters there are on the 10-Frame, or how many blank squares there are on the 10-Frame.

Look at the 10-Frame and type your answer into the blank text box.

The game will keep track of how many questions you answer correctly.

**Save the Whale** allows students to identify and extend patterns.

To play Save the Whale, look at the length of the water pipe.

Click and drag a piece of pipe from below to make the water pipe 10 sections long.

If you select the correct piece of pipe the water will flow and you will save the whale.