Adding Fractions with Cuisenaire® Rods

To add fractions, like 1/2 and 1/3, model each fraction using rods. Find a common denominator by creating a train of red rods and a train of light-green rods until both trains have the same length. The trains have the same length when they are 6 units long, so 6 is a common denominator. Using the common denominator, the fractions 1/2 and 1/3 can be expressed as equivalent fractions 3/6 and 2/6. Because the denominator represents the number of equal parts in a whole and the numerator represents the parts in the quantity, add the numerators together. There are 5 parts in total, so 1/2 + 1/3 equals 5/6.



Adding Fractions using the Brainingcamp Cuisenaire® Rods virtual manipulative.

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