Day 5: integer addition w/ counters & decomposing an addend to make zero pairs. Magic square is an oldie but a goodie. #teach180 http://pic.twitter.com/jHVeOuZRFc
— Stephanie Ling (@ling_stephanie) August 22, 2017
Day 5: integer addition w/ counters & decomposing an addend to make zero pairs. Magic square is an oldie but a goodie. #teach180 http://pic.twitter.com/jHVeOuZRFc
— Stephanie Ling (@ling_stephanie) August 22, 2017
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