Exercise 1.5 of Class 7 maths Chapter 1 is focused on using large numbers to get information and compare when using any type of table, chart. In this section, you will be required to read and answer questions through facts and figures signified from data. This can help develop your ability to read numbers in context, such as population figures, distances or years, and monetary values that are signified in the data.
This exercise is an important part of the current syllabus for Class 7 Maths in the latest NCERT curriculum and will help you be well prepared for your school's examination while developing your understanding of the meaning of numbers in our real-life context. You can refer to our step wise NCERT Solutions to see how you can solve them accurately and easily.
Practising Exercise 1.5 will also help you with reasoning and data interpretation skills - both of which will come in handy not only with your CBSE exam but also in higher classes and other competitive exams.
Exercise 1.5 contains important problems which have data-based questions using large numbers in real life situations. The NCERT Solutions for Class 7 Maths Chapter 1 will go through each question from start to finish. Click below to download the free PDF of the solutions:
Below are the key concepts covered in this exercise:
1. Find quick ways to calculate these products:
(a) 2×1768×50
(b) 72×125 [Hint: 125 = 1000/8 ]
(c) 125×40×8×25
Sol.
(a) 2×1768×50 = 2×1768×100/2 = 1768×100 = 176800
(b) 72×125 = 72×1000/8 = 9×1000 = 9000
(c) 125×40×8×25 = 1000/8 ×40×8×100/4 = 10,00,000
2. Calculate these products quickly.
(a) 25×12= ____
(b) 25×240= ____
(c) 250×120= ____
(d) 2500×12= ____
(e) ___ × ___ =120000000
Sol.
(a) 25×12 = 25×4×3 = 100×3 = 300
(b) 25×240 = 25×4×60 = 100×60 = 6000
(c) 250×120 = 250×4×30 = 1000×30 = 30000
(d) 2500×12 = 2500×4×3 = 10000×3 = 30000
(e) 25000×4800 = 25000×4×1200 = 100000×1200 = 120000000
(Session 2026 - 27)