Step 6 Objective
Add, subtract, multiply and divide integers.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
What if pupils find this a barrier?
If necessary refer back to Step 5.
- Pupils need to be secure that 1 add −1 is zero and then use this
to calculate for example:
1 + 1 + -1 + 1 =
Then move on to:
3 + -3 = - Extend to patterns such as:
2 + 1 = 3
2 + 0 = 2
2 + -1 = 1
2 + -2 = 0
2 + -3 = -1 - Extend patterns such as:
2 × 2 = 4
1 × 2 = 2
0 × 2 = 0
-1 × 2 = -2
-2 × 2 = -4 - Pupils need to be able to use the sign change key on a calculator.
- Set pupils puzzles such as magic squares, number pyramids.
- Set pupils multiplication tables with integers from -5 to +5.
Some pupils may be able to do calculations but need reminding what an integer is.