A cookie factory uses 1/2 of a barrel of oatmeal in each batch of cookies. The factory used 3 1/2 barrels of oatmeal yesterday. How many batches of cookies did the factory make?

First, to make this a bit easier, we can turn the fractions into decimals.

1/2 = 0.5 , 3 1/2 = 3.5

Divide 3.5 by 0.5.

3.5 ÷ 0.5 = 7

The factory made 7 batches of cookies.

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.