Step 1 Objective
Know by heart all addition and subtraction facts for each number to 20.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Probing questions
Look at this number sentence:
+ 
= 19. What could the two missing numbers be? What else? Can you tell/show
me all the pairs of numbers that make 19? How do you know you have got them
all?
What is 13 − 8? What other subtractions make 5?
NOTE: The easiest way to establish whether a pupil knows all addition and subtraction facts to 20 is to look for evidence of rapid recall in a range of contexts.