Mental Maths Challenge
NumberGym Software
Mental Maths Challenge offers a progressive set of mental strategies with practice and test modes to improve pupils' skills in mental arithmetic, starting from around Year 3 and continuing, typically until around Year 6/7 (age 7 to 13).
43 separate activities, each with a worked example of the strategy to use followed by Practice and Take the Test modes.
Here are some of the strategies:
Doubles (Easy, Harder, Evan Harder)
Halves (Easy, Harder, Odd Numbers - fractions and decimals)
Looking for 10s
Change from £1
adding near multiples of 10
Partitioning
Equivalent Measures
Rounding Money and lots more.