Idea 19of 22Builds onUse the unit rate for any amount
Scale a recipe up or down
How do you make three batches of pancakes taste the same?
Today you'll discover
- why every ingredient is scaled
- how to make three batches
- how to make half a batch
Think firstOne batch: 3 cups of flour and 2 eggs
For 3 batches, how much flour and how many eggs?
Decide first, then press Next. Scale every ingredient by the same number.
A ratio table: cups of flour on top and eggs below. First 3 cups and 2 eggs, with blanks for 2 and 3 batches. Then arrows times 3 to the last column; then the table filled, 3 and 2, 6 and 4, 9 and 6, with steps plus 3 and plus 2; then the last column ringed with 3 : 2 = 9 : 6 under it. The last step asks for half a batch of muffins.
See the whole ideathe big idea and the key word, in one place
The big idea
To scale a recipe, multiply or divide every ingredient by the same number.
Batch by batch
3 cups of flour and 2 eggs make one batch. Every batch after that adds the whole recipe again.
- 1 batch3 cups, 2 eggs
- 2 batches6 cups, 4 eggs
- 3 batches9 cups, 6 eggs
Easy to get wrongAdding one egg and one cup of flour is not one more batch. One more batch adds the whole recipe: 3 cups and 2 eggs.
Key word
- batch
- one full amount of a recipe; two batches is twice every ingredient
Ready to use it?
- Scale a recipe up for more batches.
- Scale a recipe down to half a batch.