Multiplying Fractions Resources

Cooking is one of the most common, everyday tasks that involves multiplying fractions. Almost every recipe has fractions, like 1/2 cup of flour or 2/3 tsp. of baking soda. Multiplying comes in when we want to make a different number of servings than the recipe states. Maybe we want to halve the recipe for a smaller group. Or we might need just a little extra for a bigger group, in which case we can make 1 and 1/2 times the recipe. Just for practice, let’s take the second example where each measure will be multiplied by 1 and 1/2 or 3/2.

• If your recipe calls for 1/2 cup, the new amount will be 3/4 cup. [Numerator: 1 x 3 = 3. Denominator: 2 x 2 = 4]
• If your recipe calls for 2/3 tsp, the new amount will be 1 tsp. [Numerator: 2 x 3 = 6. Denominator: 3 x 2 = 6. Fraction = 6/6 or one whole.]

A cooking example is a fun way to connect to your child as they try to learn this math skill. Let’s face it, most of us have to get out a pen and paper to write out the fractions and calculate each multiplication problem. It can help build motivation and be inspiring for a child to see that adults have to work hard at the skill of multiplying fractions too!

Want some more practice with fractions? Have a look at our resources on division with unit fractions.