Here are some useful websites for practising maths.
http://www.snappymaths.com/year2/y2number/y2number.htm
https://www.topmarks.co.uk/maths-games/5-7-years/counting
https://home.oxfordowl.co.uk/kids-activities/fun-maths-games-and-activities/#6-7
https://www.bbc.co.uk/bitesize/subjects/zjxhfg8