Step 3 Objective
Multiply and divide any positive integer up to 10000 by 10 or 100 and understand the effect.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Probing questions
Why do 6 × 100 and 60 × 10 give the same answer? What about 30 ÷ 10 and 300 ÷ 100?
I have 37 on my calculator display. What single multiplication should I key in to change it to 3700? Explain why this works.
Can you tell me a quick way of multiplying a number by 10? By 100?
Can you tell me a quick way of dividing a number by 10? By 100?