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LESSON
Number System
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5th - 6th grade
Mathematics
an hour ago by
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

answer choices

Natural numbers

Whole numbers

Q.

73,64,589 OR 73,65,234

answer choices

<

>

=

Q.

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

no correct answer

48,88,870

10,21,130

Q.

SUCCESSOR of 6,004

answer choices

6,005

6,003

6,002

6,000

Q.

WHICH OF THE FOLLOWING STATEMENT IS CORRECT?

answer choices

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

answer
1
alternatives
4
Q.

839 ROUNDED OFF TO THE NEAREST 10's.

answer choices

890

940

990

840

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