Ellis has 2 dozen white baseballs and 4 dozen yellow baseballshe needs to divide them into cartons that hold 6 each how many cartons can he fill

Question

I can't figure it out 

Answer 1

2 dozen = 2*12 = 24 baseballs

 

4 dozen = 4*12 = 48 baseballs

 

Ellis has 24+48 = 72 baseballs

 

72 baseballs ÷ 6 baseballs per carton = 12 cartons