Millie has a box of 1 hundred cubes. she also has a bag of 70 cubes. how many trains of 10 cubes can she make?

She can make 17 trains of 10 because 100+70 = 170 and 170 divided by ten equals 17.

So we have two situations, we need to figure out the amount of 10 block trains she can make, lets set up two equations! 

70/10=? and 100/10=? that makes it so much easier
with 70 blocks she can make 7 trains, and with a 100 blocks she can make 10 trains! 
:)