MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: Rs. 15,900
  • View Details
Get extra Rs. 1,590 off
USE CODE: SELF10

Chapter 1: Number System Exercise – 1.2

Quesiton: 1

Express the following rational numbers as decimals:

(i) 42/100

(ii) 327/500

(iii) 15/4

Solution:

(i) By long division method

Therefore, 42/100 = 0.42

(ii) By long division method

Therefore, 327/500 = 0.654

(iii) By long division method

Therefore, 15/4 = 3.75

Quesiton: 2

Express the following rational numbers as decimals:

(i)  2/3 

(ii) – (4/9)

(iii) – (2/15)

(iv) – (22/13)

(v)   437/999 

Solution:

(i) By long division method

Therefore, 2/3 = 0.66

(ii) By long division method

Therefore, - 4/9 = - 0.444

(iii) By long division method

Therefore, 2/15 = -1.333

(iv) By long division method

Therefore, - 22/13 = - 1.69230769

(v) By long division method

Therefore, 437/999 = 0.43743

Quesiton: 3

Look at several examples of rational numbers in the form of p/q (q ≠ 0), where p and q are integers with no common factor other than 1 and having terminating decimal representations. Can you guess what property q must satisfy?

Solution:

A rational number p/q is a terminating decimal

only, when prime factors of q are q and 5 only. Therefore,

p/q is a terminating decimal only, when prime

factorization of q must have only powers of 2 or 5 or both.

Get Extra Rs. 1,590 off

COUPON CODE: SELF10


Course Features

  • 728 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution