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