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THE BIG IDEAS OF ADDITION AND SUBTRACTION

THE BIG IDEAS OF ADDITION AND SUBTRACTION. WHAT IS ADDITION?. WHAT IS ADDITION?. We add quantities: More ice cream. WHAT IS ADDITION?. We add quantities: More ice cream 3 cookies and 5 cookies (5 cookies and 3 cookies). WHAT IS ADDITION?. We add quantities: More ice cream

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THE BIG IDEAS OF ADDITION AND SUBTRACTION

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  1. THE BIG IDEAS OFADDITION AND SUBTRACTION

  2. WHAT IS ADDITION?

  3. WHAT IS ADDITION? • We add quantities: • More ice cream

  4. WHAT IS ADDITION? • We add quantities: • More ice cream • 3 cookies and 5 cookies (5 cookies and 3 cookies)

  5. WHAT IS ADDITION? • We add quantities: • More ice cream • 3 cookies and 5 cookies (5 cookies and 3 cookies) • 12 blue flowers and 7 red flowers

  6. WHAT IS ADDITION? • We add quantities: • More ice cream • 3 cookies and 5 cookies (5 cookies and 3 cookies) • 12 blue flowers and 7 red flowers • 6 forks, 8 spoons, and 2 knives

  7. Writing it Down 3 5 • + 5 = 8 8 cookies

  8. The Equal Sign 3 + 5 = 8

  9. The Equal Sign 3 + 5 = 8 8 = 3 + 5

  10. The Equal Sign 3 + 5 = 8 8 = 3 + 5 2 + 6 = 7 + 1

  11. The Equal Sign 3 + 5 = 8 8 = 3 + 5 2 + 6 = 7 + 1 Get ready for algebra!!

  12. WHAT IS SUBTRACTION?

  13. WHAT IS SUBTRACTION? • Take away Malik had 9 marbles. He lost 5 marbles. How many marbles does he have now?

  14. Which operation is this?

  15. Juan has 14 cookies. Mike has 9 cookies. Who has more cookies? How many more does he have? Show how you know who has more cookies.

  16. 3 Different Subtraction Problems • I had 5 slices of pizza on my plate. The dog ate 2 slices. How many slices do I have now?

  17. 3 Different Subtraction Problems • I had 5 slices of pizza on my plate. The dog ate 2 slices. How many slices do I have now? • Marcus has 7 baseball cards. Ricardo has 12 baseball cards. How many more cards does Ricardo have?

  18. 3 Different Subtraction Problems • I had 5 slices of pizza on my plate. The dog ate 2 slices. How many slices do I have now? • Marcus has 7 baseball cards. Ricardo has 12 baseball cards. How many more cards does Ricardo have? • Maria is saving to buy a toy. She has saved $17. The toy costs $29. How much more does she need to save?

  19. Fact Families * 11 +, 8 3

  20. WHAT DO WE WANT STUDENTS TO KNOW ABOUT ADDITION AND SUBTRACTION? • That we use addition and subtraction to solve real problems.

  21. WHAT DO WE WANT STUDENTS TO KNOW ABOUT ADDITION AND SUBTRACTION? • That we use addition and subtraction to solve real problems. • That addition and subtraction are connected.

  22. WHAT DO WE WANT STUDENTS TO KNOW ABOUT ADDITION AND SUBTRACTION? • That we use addition and subtraction to solve real problems. • That addition and subtraction are connected. • That addition gives us the total. The whole amount.

  23. WHAT DO WE WANT STUDENTS TO KNOW ABOUT ADDITION AND SUBTRACTION? • That we use addition and subtraction to solve real problems. • That addition and subtraction are connected. • That addition gives us the total; the whole amount. • That subtraction helps us find a part; what is left, what is missing. • That “adding on” or “adding up” gives the same answer as subtraction.

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