1. Lesson 1-9 U. S. Traditional Subtraction
Overview: Students are introduced to U.S. Traditional Subtraction
Vocabulary: counting up, trade-first subtraction, U.S. Traditional subtraction, regroup

2. Math Message
Caleb had $90. He spent $37 on books. How much money does he have left?

3. Strategy 1 – Counting Up

4. Strategy 2 – Trade First Subtraction 235 - 159 =
Always check your answers.

5. Strategy 2 – Trade First Subtraction 235 - 159 =
Always check your answers.

6. Strategy 2 – Trade First Subtraction 235 - 159 =
Always check your answers.

7. Practice Estimates for a moment

8. U.S. Traditional Subtraction

9. U.S. Traditional Subtraction

10. U.S. Traditional Subtraction

11. U.S. Traditional Subtraction – another example

12. U.S. Traditional Subtraction – another example

13. U.S. Traditional Subtraction – another example

14. Practice
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15. Exit Ticket
836 – 487 =