Flats, Rods & Squares - Model Whole Numbers 4-110
Prepare for modeling decimals by using concrete models in a flexible way. If a flat has 9 unit squares so its value is 9 instead of 100, what's the value of the rod? Here, a rod is a flat divided into 3 equal parts, so 1 rod = 9÷3 = 3. What's the value of the square? A square is a rod divided into 3 equal parts, so 1 square = 3÷3 = 1.
