Subtraction worksheet with answers - 3 levels of differentiation KS2 Year 3 4 5 6 Must exchange

Here is a subtraction worksheet pack I have created. I have put year 3, 4, 5, or 6 as it really depends on where your class are at and children's individual needs. In regard to the national curriculum, this would be aimed at year 4. It includes place value headings and the use of chilli challenge for children to select their own difficulty. This worksheet requires children to exchange/borrow. I hope you like it! Your feedback is always welcomed. Thank you.