Millie has a box of 100 cubes. Millie also has a bag of 70 cubes. Total number of cubes Millie has = 100 + 70 = 170 Millie wants to make trains of 10 cubes each. So the number of tains Millie can make = 170/10 = 17 So Millie can make 17 trains in total with the cubes she has.
