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Grade 7 Maths: Integers poster

A one-page CAPS Grade 7 Maths poster on integers (Numbers), with the key ideas, key words and a tip to remember.

CAPS Grade 7MathsNumbersFree
Maths · Grade 7 · Numbers
Integers

1What are integers?

Integers are the whole numbers and their opposites: ... −3, −2, −1, 0, 1, 2, 3 ...

−6−4−20246

2Comparing and ordering

The further to the right on the number line, the bigger the integer.

Example

−9 < −2 < 0 < 6
−1 is bigger than −8

3Adding integers

  • Adding a positive moves right.
  • Adding a negative moves left.
  • Same signs: add and keep the sign.
  • Different signs: subtract the numbers and take the sign of the bigger one.
Example

(−1) + 9 = 8
(−4) + (−6) = −10
3 + (−9) = −6

4Subtracting integers

  • Subtracting a number is the same as adding its opposite.
  • Subtracting a positive moves left.
  • Subtracting a negative moves right.
Example

7 − (−3) = 7 + 3 = 10
(−2) − 5 = (−2) + (−5) = −7

5Integers in real life

  • Temperatures below zero: −3 °C
  • Depths below sea level: −40 m
  • Money owed or overdrawn: −R50
Example

From −3 °C to 6 °C:
6 − (−3) = 9, so it rose by 9 °C.

Key words

integer
a positive or negative whole number, or 0
negative
less than zero
opposite
the same distance from 0 on the other side
number line
a line that shows numbers in order
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For your students

Learners can practise this topic for free with a short quiz and flashcards, with no sign-up. Open the Integers revision.

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