# Intro to Rational Numbers

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

## Overview

A rational number is any number that can be made by dividing two integers. Examples of rational numbers include integers, fractions, and decimals.
Rational numbers include negative numbers. Negative numbers are numbers that
come before 0 on the number line.

Why would we need negative numbers?

Many measurements, including temperature, elevation, and electric charge use negative numbers.

For example:
Stacy checks the weather in the morning. According to her app, it’s -2 °C. She checks the weather again in the afternoon. The app now says it’s 5°C. Is it warmer or colder in the afternoon?

We can see on the number line that 5 is greater than -2. What if we want to know
how many degrees warmer it is in the afternoon?

We can count the spaces in between the numbers. We can see that the temperature was 7°C higher in the afternoon.

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Use the chart to answer this question. The chart represents lowest temperatures
in different cities during the month of February.

Represent the temperatures on the number line below.

Use the chart to answer this question. The chart represents lowest temperatures
in different cities during the month of February.

What does 0 represent on the number line in question 1?

Use the chart to answer this question. The chart represents lowest temperatures
in different cities during the month of February.

How many degrees warmer is the lowest temperature in Dallas compared to the lowest temperature in Buffalo?

Use the chart to answer this question. The chart represents lowest temperatures
in different cities during the month of February.

How many degrees cooler is the lowest temperature in Philadelphia compared
to the lowest temperature in Charlotte?

Use the chart to answer this question. The chart represents lowest temperatures
in different cities during the month of February.

Which city had the coldest day in February?

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