Letter To Family - Integers And Rational Numbers
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1Chapter 5 5
What We’re Learning
Vocabulary
integers The set of positive whole
During the next few weeks, our math class
numbers, their opposites (negative
will be learning about integers and
numbers), and zero.
rational numbers. You can expect to see
absolute value The distance of a
work that provides practice in adding,
number from zero on a number line.
subtracting, multiplying, and dividing
integers. You may wish to use this
information as a guide to help your child.
Guiding Your Child
Operations With Integers
Positive integers are whole numbers greater than zero. Negative integers are the
opposites of positive integers. Zero is an integer that is neither positive nor negative.
Use these rules for operations with integers.
Examples
Operation
Rule
7
9
2
Addition
The sum of a positive integer and a negative integer
will have the same sign as the integer with the greater
absolute value.
10
6
16
Subtraction
Subtracting an integer is the same as adding
its opposite.
12
7
19
6
3
18
Multiplication
The product of two integers with different signs is
always negative.
4
3
12
Multiplication
The product of two integers with the same sign is
always positive.
8
2
16
If one factor is zero, the product is zero.
5
0
0
Multiplication
14
2
7
Division
The quotient of two integers with the same sign is
14
2
7
always positive.
24
6
4
The quotient of two integers with different signs is
Division
always negative.
24
6
4
Sincerely,
Your child’s teacher
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