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1 Rational Numbers

Learning Objectives

After studying this chapter, students will be able to... Scan to learn
 define and identify rational numbers
 represent rational numbers on a number line
 find out infinite rational numbers between any two given rational numbers
 perform basic operations on rational numbers
 understand the properties of rational numbers and use general form of expression to describe them
 solve word problems based on real-life situations involving rational numbers

get ready!

Rohan, Siya, and their friends are working on a project based on the school garden. They need to calculate
the cost of planting flowers.

1
Rohan, this section has an area of 1 sq. m
1 2
and that one has 2 sq. m. Can you estimate Yes, Siya! We can calculate the total cost by using
2
the cost of planting flowers in these two the distributive property of rational numbers.
sections at the rate of `150 per sq. m?  1 1
  1 + 2 2  × ` 150 = 4 × `150 = `600
2

Wow, that was easy! But
what if we need to reduce
the planted area? Does the
distributive property work with
the subtraction of rational
numbers too?

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