Subtract six and one-half minus four and seven-tenths. Justify your steps.
6 1/2 - 4 7/10
When we subtract fractions, we must use a common denominator.
6 1/2 = 6 5/10
6 5/10 - 4 7/10
Now we need to borrow (or regroup).
6 5/10 = 5 15/10
5 15/10 - 4 7/10 = 1 8/10 = 1 4/5