Question

Ayanna plans to bake 3 types of cookies to take to a party. She needs to be sure that she has enough flour. The chocolate cookies use

1 3/4
cups of flour, the sugar cookies use
3 2/3
cups of flour, and the oatmeal spice cookies require
1 7/8
cups of flour. Which is the BEST estimate of the total amount of flour she will need?

Answer 1

The children brought 2+1+114=414 cups of flour and 14+12+34=112 cups of butter.

They have enough flour for

414÷34===174×43173523
batches and they have enough butter for

112÷13===32×3192412
batches, so the butter is the limiting factor. Thus, they can make 4 whole batches of a dozen cookies each.

Answer 2

Since you need an estimate, you can round up the cups of Fluor you need. So, 1 3/4 rounds to 2 cups, 3 2/3 rounds to 4 cups and 1 7/8 rounds to 2 cups.
2+4+2 = 8 cups is the best estimate