Dividing with negative numbers
Division is the inverse operation of multiplication.
If , then and .
If then and .
The logic in this argument shows that the same rules apply to division of positive and negative numbers as apply to multiplication.
When stretching or enlarging shapes, students will be required to link division with fractions. When dividing by 2 this is the same as multiplying by hence whereas an enlargement scale factor 2 doubles each length of a shape, a scale factor of , halves the length of each shape.
Use a number line to explain the following calculations. You can use the template number line to demonstrate.
This collection on the STEM Learning website consists of seven resources containing a variety of teaching activities for use when planning lessons involving performing the four operations using negative numbers.
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