Learn the methods
Learn to explain digits, bases and remainders, then practise in short sessions. Digit-counting tasks also use the case-counting methods in topic 12 and sequence sums in topic 6.
Draw a model before calculating.
Choose a method and explain when it applies.
Check units, conditions and the requested quantity.
Digit-counting tasks also use the case-counting methods in topic 12 and sequence sums in topic 6.