Starter quiz
- Calculate
- '164' ✓
- Calculate
- '145' ✓
- Which is the best estimate for (to 1 decimal place)?
- 6.2 ✓
- 6.6
- 5.9
-
- Which is the best estimate for (to 1 decimal place)?
- 6.6
- 6.9
- 6.3 ✓
-
- Which is the best estimate for (to 1 decimal place)?
- 7.1 ✓
- 6.9
- 7.5
-
- Calculate
- '113' ✓
Exit quiz
- Calculate
- '9' ✓
- Calculate
- '-36' ✓
- Calculate
- '-36' ✓
- Calculate
- '36' ✓
- Calculate
- '-4' ✓
- Calculate
- '4' ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Addition of negative integers can be made easier by considering zero pairs.
- Subtractions can all be re-written as additions of the additive inverse.
- The rules for multiplying with negative numbers can be extended to division.
Common misconception
That addition will always make the result bigger.
If pupils are struggling with the concept that adding can make an integer smaller encourage them to use counters and form zero pairs.
Keywords
Additive inverse - The additive inverse of a number is a number that, when added to the original number, gives the sum of 0.
Absolute value - The absolute value of a number is its distance from zero. E.g. 5 and (−5) are both 5 away from zero and so both have an absolute value of 5
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