the big ideas of addition and subtraction l.
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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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Presentation Transcript
what is addition3
WHAT IS ADDITION?
  • We add quantities:
    • More ice cream
what is addition4
WHAT IS ADDITION?
  • We add quantities:
    • More ice cream
    • 3 cookies and 5 cookies (5 cookies and 3 cookies)
what is addition5
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
what is addition6
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
writing it down
Writing it Down

3 5

  • + 5 = 8

8 cookies

the equal sign9
The Equal Sign

3 + 5 = 8

8 = 3 + 5

the equal sign10
The Equal Sign

3 + 5 = 8

8 = 3 + 5

2 + 6 = 7 + 1

the equal sign11
The Equal Sign

3 + 5 = 8

8 = 3 + 5

2 + 6 = 7 + 1

Get ready for algebra!!

what is subtraction13
WHAT IS SUBTRACTION?
  • Take away

Malik had 9 marbles. He lost 5 marbles. How many marbles does he have now?

slide15
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.

3 different subtraction problems
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?
3 different subtraction problems20
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?
3 different subtraction problems21
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?
fact families
Fact Families

*

11

+,

8 3

what do we want students to know about addition and subtraction
WHAT DO WE WANT STUDENTS TO KNOW ABOUT ADDITION AND SUBTRACTION?
  • That we use addition and subtraction to solve real problems.
what do we want students to know about addition and subtraction24
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.
what do we want students to know about addition and subtraction25
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.
what do we want students to know about addition and subtraction26
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.