Final answer:
The addition equation to represent the total amount of sugar Dante needs is 1.5 + 1.25 = 2.75 cups.
Step-by-step explanation:
A cookie recipe, that needs 1.5 cups of sugar.
A brownie recipe, that needs 1.25 cups of sugar.
To represent the total amount of sugar Dante needs for both the cookie and brownie recipes, we can write an addition equation by adding the amount of sugar required for each recipe.
The cookie recipe requires 1.5 cups of sugar, and the brownie recipe requires 1.25 cups of sugar.
So, the addition equation would be: 1.5 + 1.25 = 2.75 cups.