Respuesta :
100+70= 170 (how many cubes she has in total)
170/10= 17 (divide by ten because there are ten cubes in each train)
Millie can make 17 trains of 10 cubes.
170/10= 17 (divide by ten because there are ten cubes in each train)
Millie can make 17 trains of 10 cubes.