Fast addition

The four techniques that make addition instant.

Left to right
Friends of 10
Make it 100
Round and compensate
Boss: total additionPhase boss

Fearless subtraction

Finish the previous phase to unlock

Count up
Subtract the round one
Subtract in parts
Boss: total subtractionPhase boss

Multiplication

Finish the previous phase to unlock

Fluent tables
By 5, 25 and 50
The 11 trick
Split it
Boss: multiplicationPhase boss

Division

Finish the previous phase to unlock

Divide with tables
Successive halving
By 5 and 25
Boss: divisionPhase boss

Percentages

Finish the previous phase to unlock

10% opens everything
Halves and quarters
Build percentages
The mirror
Boss: percentagesPhase boss

Fractions & final exam

Finish the previous phase to unlock

Fraction of a number
Fraction to %
Mixed exam
Final bossPhase boss