I have... who has...? adding fractions with common denominators game. My students loved this game and kept asking to play it over and over again!
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Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8; 3/8 = 1/8 + 2/8; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8.
Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.