There are 379 teachers and they need 30 markers each. The markers come in a box of 16. How many full boxes must be ordered?

Answer 1

First multiply how many teachers there are by how many markers each teacher needs to find out how many markers are needed in all.

(When you see the word each, you will either multiply or divide. In this problem, you first want to know how many all together, so you will multiply.)

30 is the same as 3 x 10. So to make the problem simpler, multiply 379 x 3 and then add a zero at the end:

379 x 3 = 1,137

So 379 x 30 = 11,370 markers

Since each box holds 16 markers, divide the total amount of markers by how many markers come in a box:

11,370 ÷ 16 = 710 remainder 10

So if 710 boxes are ordered, there won’t be enough markers. So 711 boxes must be ordered.

Answer 2

There are 379 teachers and they need 30 markers each. The markers come in a box of 16. How many full boxes must be ordered?

You have: 379 teachers, 30 markers/ teacher, 16 markers/box

Need to find # of boxes

...

X boxes = (1box / 16 markers)*(30 markers / 1 teacher)*(379 teachers)

X = (1 box * 30 * 379) / (16*1)

X = 11370/16 boxes

X = 710.625

Need to round up: 711 boxes needed