ANTONIO SAID, "TO SOLVE 506-288, I CAN THINK OF 5 HUNDREDS AS 50 TENS." HOW MIGHT THIS HELP HIM SUBTRACT?
I doubt if it would help. The logic is this.
Take away 28 tens from 50 tens. that leaves 22. Now you have
226 -8 which is 218
I doubt if it would help. The logic is this.
Take away 28 tens from 50 tens. that leaves 22. Now you have
226 -8 which is 218