Small-group support
Comparisons need a common amount of one quantity.
| cups of juice | students |
|---|---|
| 2 | 6 |
| 4 | ? |
Jonah uses 2 cups of juice for every 6 students at the snack table. The same relationship has to hold for a larger amount.
To compare mixtures, write each as a ratio and look for a common number of one quantity, or compare cross products. The stronger mix has more of the first quantity for the same amount of the second. A larger total does not tell you which mix is stronger.
Problem 1 of 4. A short entry task, a model, guided examples, then a new independent try. Frames are optional.
| cups of juice | students |
|---|---|
| 2 | 6 |
| 4 | ? |
A ratio table shows 2 cups of juice for every 6 students. How many students go with 4 cups of juice?
Support frame: Factor = 4 ÷ 2. Second part = 6 × factor.