11 - Sum and Difference

Define Principle:

  • To find the sum, we add the two numbers.  To find the difference, we subtract the smaller number from the bigger number.

Discovery:

 
Skill Practice

Evaluate and Apply:

  • On your own, solve the problems on page 19 of your Singapore 3A textbook

Share:
  • Create and solve three sum and difference problems and show them to your parent or learning coach.


Video Presentations that teach these principles: 



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