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Recipe Multiplication

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Recipe Multiplication

Freya is preparing fry bread for a whānau gathering. Use multiplication to scale the recipe, and show your working where asked. Write ingredient amounts with suitable units.

The starting recipe

This recipe makes 4 pieces of fry bread.

Ingredient

Amount

Flour

2 cups

Baking powder

1½ teaspoons

Salt

½ teaspoon

Water

¾ cup

Scale up for the gathering

Freya wants to make 12 pieces. Use the starting recipe to work out the new amounts.

1.How many times as large is the 12-piece recipe as the 4-piece recipe? Write the multiplication sentence you used.

2.Calculate the flour needed for 12 pieces: 2 cups × 3. Include the unit.

3.Calculate the baking powder needed for 12 pieces: 1½ teaspoons × 3. Show how you handled the fraction.

4.Calculate the salt needed for 12 pieces: ½ teaspoon × 3.

5.Calculate the water needed for 12 pieces: ¾ cup × 3. Give your answer as a mixed number.

6.Freya has only a ¼-cup measure. How many full ¼-cup measures of water are needed for the 12-piece recipe?

7.A cousin says, “To triple 1½ teaspoons, I can do 1 × 3 and ½ × 3, then add the results.” Is the method correct? Explain and give the answer.

A smaller batch and a kai plan

Now imagine Freya needs a smaller batch, then plan how the ingredients change for a bigger gathering.

8.For 2 pieces, Freya makes half of the starting recipe. How much flour and water will she need?

9.The gathering grows to 20 people, with one piece planned for each person. How many times the starting recipe is needed? How much flour will that take?

10.Choose a doubling-and-halving route to check the flour amount for 12 pieces. Explain why your route gives the same result as multiplying by 3.