12. Test
Yourself
1. Use a number line to represent the
integers from
(a) -3 to 4
(b) -20 to -15
13. tol
Comparing two integers
C
On a horizontal number line , an integer is
always greater than the integers to its left
and less than the integers to its right.
14. Example
-4 -3 -2 -1 0 1 2 3
-2 is greater than -4 but is less than 1.
15. Arranging integers in order
D
1. We can arrange integers in increasing or
decreasing order using a number line.
16. 2. We can identify the largest integer and
the smallest integer by arranging the
given integers in order.
18. solution
-5 -4 -3 -2 -1 0 1 2 3
The largest integer is 3 and the smallest
integer is -5
19. 2.2 Addition and Subtraction of Integers
Addition of Integers
A
1. Addition of Integers is a process of
finding the sum of two or more integers.
20. 2. Addition an Integers to a positive
integer can be represented using a number
line by a movement towards the positive
direction, which means from left to right.
-2 -1 0 1 2
+4
For example, -2 + 4 = 2
21. 3. Adding an integer to a negative integer
can be represented using a number line by
a movement towards the negative direction,
which means from right to left
-2 -1 0 1 2
-4
For example, 2 +(-4)=-2
22. 4. Integers with like signs are integers
with the same sign.
For
example
2 and 5
-8 and -12
23. 5. Integers with unlike signs are integers
with different signs.
For
example
-4 and 10
3 and -9