Mental maths : daily workout /
Patilla, Peter.
Broadbent, Paul.
Harlow : Addison Wesley Longman,
1997.
Book 1 for pupils aged 6-7 - Book 2 for pupils aged 7-8 - Book 3 for pupils aged 8-9 - Book 4 for pupils aged 9-10 - Book 5 for pupils aged 10-11
Mental arithmetic
Mental arithmetic