Answer: £1.22
Explanation:
You start with £3.00. To remove £1.78, we can subtract in several steps from both £3 and £1.78 until £1.78 is 0:
First, subtract £1 from £3 and £1.78, to get £2 and £0.78
Then we can subtract £0.70 from £2 and £0.78, to get £1.3 and £0.08
Lastly, we subtract £0.08 from £1.3 and £0.08, to get £1.22 and £0.
I hope this helps