Step 3 Objective
Extend efficient written methods to long multiplication of TU by TU.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Probing questions
Give pupils a multiplication question (for example, 37 × 14) calculated by both the grid method and long multiplication. Ask questions such as:
What two numbers multiplied together have the answer 370?
How would it be different if I worked out 14 × 37, i.e. put the numbers the other way around?
Give pupils some long multiplications with mistakes in them.
Ask them to identify the mistakes, talk through what is wrong and say how they should be corrected. Ask them to estimate the answers.