# Surf for More Math

## CHAPTER 8: ADDITION AND SUBTRACTION

**Lesson 2: Adding One-Digit Numbers to Two-Digit Numbers**

Use these interactive activities to encourage students to have fun on the Web while learning about adding and subtracting two-digit numbers. Students can try these activities on their own or in pairs.

**Goal**

Use personal strategies for adding a one-digit number to a two-digit number with manipulatives.

[C, CN, ME, PS, R]

**Instructions for Use**

**Adding** allows students practice with adding two-digit numbers to a one-digit number.

To use Adding, enter the sum of the numbers shown and click Submit. When you have answered the last question, click Submit & Finish to get a summary of your score.

**Addition Machine** lets students practice adding 2 one-digit numbers, adding 1 two-digit number and 1 one-digit number, and adding 2 two-digit numbers.

To use Addition Machine, select Level 2 to practise adding 2 one-digit numbers, and 1 two-digit number and 1 one-digit number. Enter your answer in the white box and click “Check my answer.” Your score is shown to the right. Select the Level for each question.