Exercise 1.4 deals with real experience of large numbers, such as converting units and computing values. You will come across questions where you need to convert large units, such as kilometers to meters, rupees to paise, etc. Converting units is commonplace in our daily lives, and learning to work with these types of problems can be useful.
This exercise follows the recent NCERT syllabus and fits into the CBSE Class 7 Maths study. Practicing regularly will develop accuracy in conversions and provide some experience and understanding of quantities that large numbers generate for daily, practical issues. The NCERT Solutions take you through in a step-by-step manner for clear understanding of the concepts.
With consistent practice, you will prepare accordingly for school examinations and gain an understanding in solving similar problems with speed.
Exercise 1.4 of NCERT Solutions for Class 7 Maths Chapter 1 includes unit conversion problems using large numbers in real-life examples and every step is explained in an easy-to-follow manner. Click below to download the free PDF and start solving.
The key Concepts covered in this exercise are:
1. Read the following numbers in Indian place value notation and write their number names in both the Indian and American systems:
(a) 4050678
(b) 48121620
(c) 20022002
(d) 246813579
(e) 345000543
(f) 1020304050
Sol. (a) Indian System 40,50,678
Forty lakh fifty thousand six hundred seventy-eight.
American System 4,050,678
Four million fifty thousand six hundred seventy-eight.
(b)
Indian System 4,81,21,620
Four crore eighty-one lakh twentyone thousand six hundred twenty.
American System
48,121,620
Forty-eight million one hundred twenty-one thousand six hundred twenty.
(c)
Two crore twenty-two thousand two.
American System:
20,022,002
Twenty million thousand two.
(d)
Twenty-four crore sixty-eight lakh
thirteen thousand five hundred
American System
246,813,579
Two hundred forty-six million eight hundred thirteen thousand five hundred seventy-nine
(e) Indian System:
34,50,00,543
Thirty-four crore fifty lakh five hundred forty-three.
American System:
345,000,543
Three hundred forty-five million five hundred forty-three.
(f) Indian System:
1,02,03,04,050
One arab two crore three lakh four thousand fifty.
American System:
1,020,304,050
One billion twenty million three hundred four thousand fifty.
2. Write the following numbers in Indian place value notation:
(a) One crore one lakh one thousand ten
(b) One billion one million one thousand one.
(c) Ten crore twenty lakh thirty thousand forty.
(d) Nine billion eighty million seven hundred thousand six hundred.
Sol. (a) In Indian place value notation 1,01,01,010
(b) One billion one million one thousand one - 1,001,001,001 In Indian place value notation 1,00,10,01,001
(c) In Indian place value notation 10,20,30,040
(d) Nine billion eighty million seven hundred thousand six hundred
9,080,700,600
3. In Indian place value notation 9,08,07,00,600
Compare and write ' < ', ' > ' or ' = ':
(a) 30 thousand ____ 3 lakhs
(b) 500 lakhs ____ 5 million
(c) 800 thousand ____ 8 million
(d) 640 crore ____ 60 billion
Sol. (a) 30 thousand =30,000
3 lakhs = 3,00,000
30 thousand < 3 lakh
(b) 500 lakhs =50000000
5 million =5000000
500 lakhs > 5 million
(c) 800 thousand = 800000
8 million = 8000000
800 thousand < 8 million
(d) 640 crore =6400000000
60 billion = 60000000000
640 crore < 60 billion
(Session 2026 - 27)