Basic features - Examples, Exercises and Solutions

In the previous articles we studied about the number line and integers. In this article we will explain what opposite numbers are, and how to identify them.

What are opposite numbers, and how to identify them?

Opposite numbers are numbers that when added together result in the number $0$.

The opposite of a number has the same absolute value, but with opposite sign.

Examples:

• $+3$ and $-3$ are opposite numbers.
• $+9.4$ and $-9.4$ are opposite numbers.
• $+\frac{1}{4}$ and $-\frac{1}{4}$ are opposite numbers (fractions).

Practice Basic features

Exercise #1

What is the opposite number of $5$

Video Solution

$-5$

Exercise #2

What is the opposite number of $87$

Video Solution

$-87$

Exercise #3

What is the opposite number of $0.7$

Video Solution

$-0.7$

Exercise #4

What is the opposite number of $-7$

Video Solution

$7$

Exercise #5

What is the opposite number of $-0.25$

Video Solution

$0.25$

Exercise #1

$(+43)-(+15)=$

Video Solution

$28$

Exercise #2

$(+71)+(-18)=$

Video Solution

$53$

Exercise #3

What is the opposite number of $-\frac{8}{7}$

Video Solution

$\frac{8}{7}$

Exercise #4

$(+0.5)+(+\frac{1}{2})=$

Video Solution

$1$

Exercise #5

$(+\frac{18}{6})-(-\frac{1}{4})=$

Video Solution

$3.25$

Exercise #1

$(-\frac{2}{4})-(+3.5)=$

Video Solution

$-4$

Exercise #2

$(-2^2)-(-3\frac{3}{4})=$

Video Solution

$-\frac{1}{4}$

Exercise #3

$(-x)^2-(+25)=$

Video Solution

$x=±5$

Exercise #4

$(+2.16)+(-4\frac{1}{16})=$

Video Solution

$-1.90625$

Exercise #5

$(-3\frac{2}{6})+(-2.75)=$

Video Solution

$-6\frac{1}{12}$