What does: 1 + 7 = ___ + 6
have to do with: 3x + 9 = 5x + 5
…and why are first graders arguing with each other over the meaning of the equal symbol?
What does: 1 + 7 = ___ + 6
have to do with: 3x + 9 = 5x + 5
…and why are first graders arguing with each other over the meaning of the equal symbol?