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Transcript

  • 1. Addition Strategies
    Niky Hunt
    Cohort 22
    9/22/09
  • 2. Standards
    NS 3.1 – solve addition and subtraction problems with large numbers
  • 3. Addition
  • 4. Jumping
  • 5. Jumping
    Draw the Number Line
    Begin at your starting point
    Jump the number that will be added
    0+9=9
  • 6. Jump the Friendly Tens
    Draw a number line
    Begin at your starting point
    Jump by tens until you reach your goal
    10+30=40
    10
    10
    10
    30
    40
    10
    20
  • 7. Putting It All Together
    Draw a number line
    Begin at your starting point
    Jump by tens
    Jump the ones
    22+33=55
    10
    10
    10
    1
    1
    1
    32
    42
    53
    52
    55
    54
    22
  • 8. Expanded Form
  • 9. Adding with Tens
    Write each number in expanded form
    Add the tens
    Add the one
    Add the sum of each
    34+32
    30+4+30+2
    60+4+2
    60+6
    60+6=66
  • 10. Adding with Hundreds
    Write each number in expanded form
    Add the hundreds
    Add the tens
    Add the one
    Add the sum of each
    362+234
    300+60+2+200+30+4
    500+60+2+30+4
    500+90+2+4
    500+90+6
    500+90+6=596
  • 11. Adding with Thousands
    2362+5234
    2000+300+60+2+5000+200+30+4
    7000+300+60+2+200+30+4
    7000+500+60+2+30+4
    Write each number in expanded form
    Add the thousands
    Add the hundreds
    Add the tens
    Add the one
    Add the sum of each
    7000+500+90+2+4
    7000+500+90+6
    7000+500+90+6=
    7596
  • 12. Splitting
  • 13. Splitting with Tens
    Split only one of the numbers to be added
    Add the tens to the number left whole
    Add the ones
    34+47
    34+40+7
    74+7
    74+7=81
  • 14. Splitting with Hundreds
    Split only one of the numbers to be added
    Add the hundreds to the number left whole
    Add the tens
    Add the ones
    234+647
    234+600+40+7
    834+40+7
    874+7
    874+7=881
  • 15. Splitting with Thousands
    Split only one of the numbers to be added
    Add the thousands to the number left whole
    Add the hundreds
    Add the tens
    Add the ones
    8234+1647
    8234+1000+600+40+7
    9234+600+40+7
    9834+40+7
    9874+7=9881
  • 16. References
    Images from Microsoft Clip Organizer