1-3Example 1

Find the difference of –2 and –4. Use algebra tiles.

1. Write the subtraction expression.

–2 – (–4)

1-3Example 1

Find the difference of –2 and –4. Use algebra tiles.

2. To subtract integers, add the opposite.

Write the addition expression.

–2 + 4

This is the new expression.

1-3Example 1

Find the difference of –2 and –4. Use algebra tiles.

3. Use two negative algebra tiles to represent the first number.

1-3Example 1

Find the difference of –2 and –4. Use algebra tiles.

4. Use four positive algebra tiles to represent the second number.

1-3Example 1

Find the difference of –2 and –4. Use algebra tiles.

5. You can make 2 zero pairs.

1-3Example 1

Find the difference of –2 and –4. Use algebra tiles.

6. What is left over?

+2

1-3Example 1

Find the difference of –2 and –4. Use algebra tiles.

7. Write the difference.

–2 – (–4) = 2