20. Number Lines
Number lines are a great way to do integer
problems because you can take a look at how the
adding/ subtraction, multiplying or dividing
works.
24. Adding Integers
For Example:
-4 + -5
When both of the numbers have the
same signs then you can treat it like
normal adding then adding the sign
they have (-, +)
25. Adding Integers
For Example:
-4 + -5
Answer: 9
When both of the numbers have the
same signs then you can treat it like
normal adding then adding the sign
they have (-, +)
29. Adding Integers
For Example:
-4 + (- 6)
When there is a bracket the
number in the bracket becomes
the opposite. So this problem
becomes -4 + 6.
30. Adding Integers
For Example:
-4 + (- 6)
Answer: -10
When there is a bracket the
number in the bracket becomes
the opposite. So this problem
becomes -4 + 6.
34. Subtracting
Integers
For Example:
-10 - 9
You can treat it as 10 +9 because it
becomes positive and it becomes the
opposite
35. Subtracting
Integers
For Example:
-10 - 9
Answer: 19
You can treat it as 10 +9 because it
becomes positive and it becomes the
opposite
36. Multiplying Rules:
Positive x Positive = Positive
Negative x Negative = Positive
Negative x Positive = Negative
Positive x Negative = Negative
37. Multiplying Integers
Multiplying Rules:
Positive x Positive = Positive
Negative x Negative = Positive
Negative x Positive = Negative
Positive x Negative = Negative
38. For Example:
-4 x -5 =
Answer: 20
You can treat this like a normal multiplication
problem, because a negative integer multiplied
by another negative integer is a positive
number.
39. Multiplying Integers
For Example:
-4 x -5 =
Answer: 20
You can treat this like a normal multiplication
problem, because a negative integer multiplied
by another negative integer is a positive
number.