Half the Recipe: The Big Bake Sale

It’s the Big Bake Sale at Millie’s school! Millie, Grandma Bea and Millie’s friends bake brownies, cookies and muffins, and sometimes they only need half a recipe. These are challenge problems: most take two steps.

Remember: To halve a recipe, share every ingredient into 2 equal parts: 4 eggs → 2 eggs, 300 ml → 150 ml. For two-step problems, do one step, then use that answer in the next step.

Magic trick: Halve big numbers in pieces: half of 300 is half of 200 plus half of 100, so 100 + 50 = 150.