Students connect addition and subtraction as views of one part–part–whole relationship, writing complete fact families (4 + 3 = 7, 3 + 4 = 7, 7 − 3 = 4, 7 − 4 = 3) and meeting commutativity of addition informally.
Intermediate Level
Students connect addition and subtraction as views of one part–part–whole relationship, writing complete fact families (4 + 3 = 7, 3 + 4 = 7, 7 − 3 = 4, 7 − 4 = 3) and meeting commutativity of addition informally.




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Q: 10
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Q: 10
Plays: 0
Q: 10
Plays: 0
