http://www.edu.gov.on.ca/eng/curriculum/elementary/grade1.html
http://www.edu.gov.on.ca/eng/curriculum/elementary/grade2.html
http://www.edu.gov.on.ca/eng/curriculum/elementary/grade2.html
A fun rhyme to help with when to regroup... More on top, no need to stop 28 -13
More on the floor, go next door 53
-27
Numbers the same, zero's the game 68
-38
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