1. Problem Solving and Operations: Addition and Subtraction
Tuesday, January 14, 2014
Presented By
Sara Delano Moore, Ph. D.
Director of Mathematics and Science at ETA hand2mind
Join our community Implementing Common Core Standards in Math

2. Implementing Common Core Standards in Math
A CE certificate for today’s webinar
will be ed to you
24 hours after the live session
Join our community
Implementing Common Core Standards in Math
Invitations to upcoming webinars
Webinar archives and resources
Online discussions
CE quizzes for archived webinars

4. Webinar Tips
For better audio/video, close other applications (like Skype) that use bandwidth.
Maximize your screen for a larger view by using the link in the upper right corner.
You will be ed a CE certificate within 24 hours for attending today.
You will also receive information to access the recording of the webinar and the slides.
Tweeting? Use the hashtag #edwebchat

5. Problem Solving and Operations: Addition & Subtraction
Sara Delano Moore, Ph.D.
Director of Mathematics & Science
ETA hand2mind

6. Problem Solving Series
January - Problem Solving and Operations: Addition & Subtraction
February – Problem Solving and Operations: Transitioning from Addition to Multiplication
March – Problem Solving and Operations: Multiplication and Division

7. Adding and Subtracting
Traditional Sense
Join or put together & find a total
Separate or take apart and find the difference
But wait, there’s more!

8. K 1 2 K 1 2 K 1 K 1 1 1 1 2 2
CCSS-M, page 88

9. Kindergarten Mastery Add to, total unknown
A + B = ?
Take from, difference unknown
C – B = ?
Put together/take apart, total unknown
Put together/take apart, both addends unknown
C = ? + ?

10. First Grade Mastery Add to, change unknown Take from, change unknown
A + ? = C
Take from, change unknown
C – ? = A
Put together/take apart, addend unknown
A + ? = C or C – A = ?
Compare, difference unknown, “How many more?”
Compare, difference unknown, “How many fewer?”
Compare, bigger unknown, “How many more?”
A + B = ?
Compare, smaller unknown, “How many fewer?”
C – B = ? or ? + B = C

11. Second Grade Mastery Add to, start unknown Take from, start unknown
? + B = C
Take from, start unknown
? – B = A
Compare, bigger unknown, “How many fewer?”
A + B = ?
Compare, smaller unknown, “How many more?”
C – B = ? or ? + B = C

12. What’s next?
Think about your instruction. Is there enough variety of problem types?
Are you working in an appropriate developmental sequence?
Item types here focus on mastery grade levels. You can introduce them earlier when the context is appropriate.

13. Implementing Common Core Standards in Math
A CE certificate for today’s webinar
will be ed to you
24 hours after the live session
Join our community
Implementing Common Core Standards in Math
Invitations to upcoming webinars
Webinar archives and resources
Online discussions
CE quizzes for archived webinars

14. Problem Solving and Operations:
Join us for the next webinar
Tuesday, February 11, 2014 at 4PM Eastern Time
Problem Solving and Operations:
Transitioning from Addition to Multiplication
Join the Implementing Common Core Standards in Math
community for an invitation

15. Thank you