# Surf for More Math

## CHAPTER 8: ADDITION AND SUBTRACTION

**Lesson 8: Solving Comparison Problems **

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.

**Goals**

Solve comparison problems by adding and subtracting.

Use personal strategies to add and subtract with manipulatives.

[C, CN, ME, PS, R, V]

**Instructions for Use**

**Comparison Problems** provides students with extra practice comparing subtraction problems to addition problems.

To use Comparison Problems, click on Lesson 13.5. Use addition to select the correct answer from the three choices. Click Check Your Answer. If your answer is correct, it will show your score and another question. If you are incorrect, you will be asked to try again. When you have completed several questions, click End the Quiz. Your final score is shown.