 # Surf for More Math

## Lesson 10 - Subtracting with Dimes and Pennies

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

### Goal

Subtract a 1-digit number from a 2-digit number, with regrouping.

### Instructions for Use

Change Maker helps students find how much change is left from a sale.

To use Change Maker, subtract the amount of the sale from the amount paid. Click on the combinations of coins to collect the correct change. Click the "Go" button to see if the answer is correct. Try the next question.

Interactive Calculator allows students to subtract a 1-digit number from a 2-digit number, and display them on a 100 chart.

To use Interactive Calculator, start by clicking a 2-digit number on the interactive calculator. This number will appear in the calculator window. Click the "-" button on the calculator, and then click a 1-digit number. Click the "=" button on the calculator.   