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Lesson: Recipes
Activity Statement: Number Talk: Adjusting a Factor with Whole Numbers
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Activity Launch: Salty Water
Activity Statement: Salty Water
Here are diagrams representing three mixtures of salty water:
Use the diagrams to complete each statement.
1. Mixture C uses ______ cups of water and ______ teaspoons of salt. The ratio of cups of water to teaspoons of
salt in mixture C is ________.
2. Mixture B uses ______ cups of water and ______ teaspoons of salt. The ratio of cups of water to teaspoons of
salt in mixture B is ________.
3. How would the taste of mixture C compare to the taste of mixture B?
Activity Statement: Batches of Cookies
A recipe for one batch of cookies calls for 5 cups of flour and 2 teaspoons of vanilla.
1. Draw a diagram that shows the amount of flour and vanilla needed for two batches of cookies.
2. How many batches can you make with 15 cups of flour and 6 teaspoons of vanilla? Indicate the additional
batches by adding more ingredients to your diagram.
3. How much flour and vanilla would you need for 5 batches of cookies?
Whether the ratio of cups of flour to teaspoons of vanilla is
that taste the same. We call these equivalent ratios.
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, or
, the recipes would make cookies
4. Find another ratio of cups of flour to teaspoons of vanilla that is equivalent to these ratios.
5. How many batches can you make using this new ratio of ingredients?
Activity Statement: Emergency Bird Food
Usually when Elena makes bird food, she mixes 9 cups of seeds with 6 tablespoons of maple syrup. However,
today, she is short on ingredients. Come up with a recipe that would yield a smaller batch of bird food but still
taste the same. Explain or show your reasoning.