Number

1. Four operations

http://www.mathsphere.co.uk/fun/

2. Adding up to 10

http://www.primarygames.com/math/mathlines/index.htm

3. Sudoku

http://www.primarygames.com/puzzles/sudoku/killersudoku/start.htm

4. Ascending order of numbers

http://www.primarygames.com/math/numberballs/index.htm

5. Number maze

http://www.primarygames.com/math/mathman/index.htm

6. Mental Maths (1)

http://www.primarygames.com/math/quickmath/start.htm

7. Mental Maths (2)

http://funschool.kaboose.com/formula-fusion/carnival/games/game_math_popper.html

8. Multiplication

http://www.bbc.co.uk/schools/ks1bitesize/numeracy/multiplication/index.shtml

9. Division

http://www.bbc.co.uk/schools/ks1bitesize/numeracy/division/index.shtml

10. Fraction

http://funschool.kaboose.com/fun-blaster/back-to-school/games/game_action_fraction.html

11. equivalent fraction

http://www.funbrain.com/fract/index.html

12. Decimal

http://www.bbc.co.uk/schools/ks1bitesize/numeracy/units/index.shtml