Hank has a board 1.75 meters long.He used 0.8 meter to build the walls of a birdhouse.He used 0.4 of what is left for the floor.He needs 0.6 meter for the roof.Does he have enough wood for the roof? EXPLAIN
He doesn't have enough wood for the roof explanation: If you subtract 0.8 from 1.75 that 0.95 if you then subtract 0.4 from 0.95 you get 0.55 so you can't subtract the last one 'cause if you do you'll get -0.05.