Fair Use Agreement This agreement covers the use of this presentation, please read carefully. You may freely use these slides for teaching, if You send me an email telling…
Operations and Numerical Fluency 25 + 25 = 10 + 10 + 5 + 10 + 10 + 5 = 10, 20, 25, 35, 45, 50 20 + 20 + 5 + 5 = 40 + 10 = 50 I just thought of it as 2 quarters and 2 quarters…