Download Integers

Starter Questions
1. Express the following percentages as fractions
in their simplest form
a) 45%
b) 5%
c) 90%
2. The answer to the question is A = ½ x b x h.
What is the question?
122º
3. Find the missing angles
a, b and c
a
c
b
Integers
Learning Intentions
To be able to add and subtract
positive and negative numbers
Integers
We can use a number line to help us add positive and
negative integers.
–2 + 5 == 3
-2
3
To add a positive integer we move forwards up the
number line.
Integers
We can use a number line to help us add positive and
negative integers.
–7 + 3 == -4
-7
-4
To add a positive integer we move forwards up the
number line.
Integers
We can use a number line to help us add positive and
negative integers.
2 - 5 == -3
-3
2
To subtract a positive integer we move backwards
down the number line.
Integers
We can use a number line to help us add positive and
negative integers.
-4 - 5 == -9
-9
-4
To subtract a positive integer we move backwards
down the number line.
Integers
We can use a number line to help us add positive and
negative integers.
–3 + –4 == –7
-7
-3
To add a negative integer we move backwards down
the number line.
–3 + –4
is the same as
–3 – 4
Integers
We can use a number line to help us add positive and
negative integers.
6 + –3 = 3
3
6
To add a negative integer we move backwards down
the number line.
6 + –3
is the same as
6–3
Integers
Now try Ex 3
Pg 62
Chapter 5
Integers
Learning Intentions
To be able to add and subtract
positive and negative numbers