The document defines integers as whole numbers that can be positive or negative. It explains that negative integers get larger as they approach zero and have a negative sign. Positive integers are the whole numbers we typically work with. Number lines are used to visualize integer operations by showing their relative positions. Adding integers keeps the same sign if both numbers have the same sign, and opposites the sign if they are different. Subtracting integers treats the number being subtracted as a positive by changing its sign. Multiplying and dividing integers follows specific rules where the result is negative if an odd number of factors are negative.
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.
42. Multiplying Integers
For Example:
-4 x -5 =
You can treat this like a normal multiplication
problem, because a negative integer multiplied
by another negative integer is a positive
number.
43. 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.
