 LESSON
Number System
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14 slides

Number System

Important terms and interesting questions Important Terms

• The counting numbers are called natural numbers.

• Writing a number in figures is called notation.

• Writing a number in words is called numerations.

• These symbols are called digits,

• A group of digits, denoting a number is called a numeral.

• All natural numbers together with 0 are called whole numbers.

• Every natural number is a whole number but 0 is a whole number which is not a natural number.﻿

Important Terms

• The face- value of a digit is the digit itself, wherver it may be.

• Place-value of a digit = (Its face-value) x (Value of the place).

• The place value of 0 is always 0.

• A number 1 more than the given number is called its successor.

• A number 1 less than the given number is called its predecessor.

• A number having more digits is greater than another having fewer digits.

• Numbers in ascending order means the number from smaller to grater. Indian Place-Value Chart International Place-Value Chart

Questions

Check for understandings

Q.

THE COUNTING NUMBERS ARE CALLED AS

Natural numbers

Whole numbers

Q.

73,64,589 OR 73,65,234

<

>

=

Q.

8,36,570 + 1,84,560 =

48,88,870

10,21,130

Q.

SUCCESSOR of 6,004

6,005

6,003

6,002

6,000

Q.

WHICH OF THE FOLLOWING STATEMENT IS CORRECT?

4,80,798 < 4,81,612

8 is the smallest counting number.

The smallest counting number is 1

381x316=75,78,527

Q.

WHICH IS THE SMALLEST COUNTING NUMBER

1
alternatives
4
Q.

839 ROUNDED OFF TO THE NEAREST 10's.  