Exercise 1.2 focuses on using large numbers in day-to-day scenarios. The problems are relevant to areas such as population, distance, money, and other everyday problems involving large numbers. The exercise gives you a practical opportunity to practice the skills you developed in Exercise 1.1.
Our NCERT Solutions for Class 7 Maths are written in straightforward language and are tailored to the latest NCERT syllabus of the Class 7 Mathematics textbooks. The language used in our NCERT Solutions are simple and structured so that you will find it easy to follow each step clearly, giving you the ability to solve the question set with confidence. Doing the exercise will also improve your problem-solving speed, as well as prepare you for your school exams other competitive exams
Exercise 1.2 addresses real-life questions using big numbers in topics like money and distance. The NCERT Solutions for Class 7 Maths Chapter 1 help you solve these problems in a step by step manner. Click below to download the free PDF of the solutions:
The Key Concepts covered in this exercise is;
1. For each number given below, write expressions for at least two different ways to obtain the number through button clicks. Think like Chitti and be creative.
(a) 8300
(b) 40629
(c) 56354
(d) 66666
(e) 367813
Sol. Chitti is a calculator like smart matrix and it has the following buttons: +1,+10, +100, +1000, +10000, +100000 and +1000000 .
(a) Way1: (8×1000)+(3×100)
=8000+300=8300
Way2: (83×100)=8300
(b) Way1: (4×10000)+(6×100)+(2
×10)+(9×1)
=40000+600+20+9
=40629
Way2: (40×1000)+(6×100)+(29×1)
=40000+600+29
= 40629
(c) Way1: (5×10000)+(6×1000)+(3
×100)+(54×1)
=50000+6000+300+54
=56354
Way2: (56×1000)+(35×10)+(4×1)
=56000+350+4
= 56354
(d) Way1: (6×10000)+(6×1000)+
(6×100)+(66×1)
=60000+6000+600+66
= 66666
Way2: (66×1000)+(66×10)+(6×1)
=66000+660+6
= 66666
(e) Way1: (3×100000)+(6×10000)+
(7×1000)+(8×100)+(13×1)
=300000+60000+7000+800+13
=367813
Way2: (36×10000)+(78×100)+
( 13×1 )
=360000+7800+13
= 367813
(Session 2026 - 27)