http://www.math-exercises-for-kids.com/learning-mathematics-9.htm lots of different activities. Try the word problems. You can use some paper to help write down your working, it doesn’t all have to be done mentally.
http://www.mathplayground.com/JKA_Begin.html
http://www.topmarks.co.uk/maths-games/7-11-years/fractions-and-decimals some fractions games to look at
RM Easimaths
Mangahigh