Rational numbers are numbers that can be written as fractions. The word "rational" comes from "ratio" - which means comparing two numbers!
Simple Examples:
½ (one half), ¾ (three quarters), ⅔ (two thirds)
Even whole numbers are rational:
5 = ⁵⁄₁, -3 = -³⁄₁, 0 = ⁰⁄₁
Sharing Food:
If 4 friends share 3 pizzas equally:
Each gets ¾ of a pizza
¾ is a rational number!
Cricket Overs:
In limited overs cricket:
If a bowler bowls 4.3 overs
4.3 = 4 + ³⁄₁₀ = ⁴³⁄₁₀
This is a rational number!
Measurements:
Length: 2.5 meters = ²⁵⁄₁₀ = ⁵⁄₂
Weight: 0.75 kg = ⁷⁵⁄₁₀₀ = ¾
Time: 1.5 hours = ¹⁵⁄₁₀ = ³⁄₂
In this chapter, we will learn:
Rational numbers help us:
For Class 7 Students (NCERT & JKBOSE)