Step 5 Objective

Find the difference between a positive and a negative integer, or two negative integers, in a context such as temperature or the number line.

Examples of what pupils should know and be able to do

Probing questions

Talk me through the picture in your mind when you calculate the answer to the following question:

The temperature is -5° C. If it falls by 6 degrees, what will the temperature be?

What if pupils find this a barrier?

Build on understanding of difference, using a number line to count on or back.

Use vertical and horizontal number lines.

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