Fluency with Number Bonds and x tables is essential. Please work on these often.
Hit the Button
https://www.topmarks.co.uk/maths-games/hit-the-button
Play the subtraction grids game below – use your knowledge of number bonds to help you.
https://www.topmarks.co.uk/maths-games/subtraction-grids
Write down 10 missing number sentences e.g. 20 - ___ = 13 or 100 - 35 =