Decimal Addition & Subtraction Like You’ve Never Seen

# Decimal Addition & Subtraction Like You’ve Never Seen

## Decimal Addition & Subtraction Like You’ve Never Seen

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1. Decimal Addition & Subtraction Like You’ve Never Seen • Pamela Weber Harris • @pwharris • pamelawharris.com • pharris@byu.net

2. Next Session:Friday 8:00 Decimal Multiplication & Division3:00 Percents

3. Math is figure-out-able!

4. Counting Additive Multiplicative Proportional Reasoning Algebraic Reasoning

5. Problem Strings • Build Strategies while building Place-Value

6. Younger Students • Build Additive Thinking

7. Problem Strings 49 + 1049 + 949 + 4049 + 393.8 + 13.8 + 0.93.8 + 53.8 + 4.97.27 + 27.27 + 1.996.6 + 2.96

8. Problem Strings Over Strategy 49 + 1049 + 949 + 4049 + 393.8 + 13.8 + 0.93.8 + 53.8 + 4.97.27 + 27.27 + 1.996.6 + 2.96

9. Counting Additive Multiplicative Proportional Reasoning Algebraic Reasoning

10. Problem Strings 99 + 199 + 2799 + 689.9 + 0.19.9 + 3.74.98 + 0.024.98 + 2.636.74 + 1.2556.97 + 38.98

11. Problem Strings Give & Take 99 + 199 + 2799 + 689.9 + 0.19.9 + 3.74.98 + 0.024.98 + 2.636.74 + 1.2556.97 + 38.98

12. Not just about any way to do a problem......

13. The Landscape of Learning

14. Problem Strings 53 - 4831 - 47.2 - 6.95.3 - 0.556.11 - 0.2248.03 - 47.99

15. 53 - 4831 - 47.2 - 6.95.3 - 0.556.11 - 0.2248.03 - 47.99 Problem Strings Difference versus Removal

16. Problem Strings 6.5 - 2.96.2 - 2.67.1 - 3.56.3 - 2.76.6 - 3.07.6 - 4.013.2 - 9.6

17. Problem Strings Constant Difference 6.5 - 2.96.2 - 2.67.1 - 3.56.3 - 2.76.6 - 3.07.6 - 4.013.2 - 9.6

18. Connections to Higher Math

19. Counting Additive Multiplicative Proportional Reasoning Algebraic Reasoning

20. Math is Figure-out-able • Look to most efficient strategies • Teachers build own numeracy • It’s about relationships: • Among numbers to solve problems • Between teachers and students to build young mathematicians

21. Next Session:Friday 8:00 Decimal Multiplication & Division3:00 Percents

22. Decimal Addition & Subtraction Like You’ve Never Seen • Pamela Weber Harris • @pwharris • pamelawharris.com • pharris@byu.net