Knowing Our Numbers Worksheet With Answers printable pdf download

Knowing Our Numbers Worksheet With Answers

Knowing Our Numbers

N THIS CHAPTER

YOU WILL LEARN

• Natural numbers

• Place value and face value of a digit in a number

• Indian system of numeration

• International system of numeration

• Use of commas in reading and writing large numbers

• Comparison of numbers

• Formation of numbers

• Conversion of units of length, mass and capacity

• Word problems on large numbers

• Estimation of numbers to a certain degree of accuracy

• Roman numerals.

naturaL numbers

In earlier classes, we have been dealing with counting numbers 1, 2, 3, 4, ... etc. These counting

numbers are called natural numbers. The smallest natural number is 1.

Natural numbers are used in many different contexts and in many ways. Natural numbers help us

in counting concrete objects. We can count objects in large numbers. For example, the number of

students of your school, the number of people of your city (town or village). As the process of

counting is endless, there is no largest natural number.

digits or figures

Any number (howsoever large) can be written with the use of ten symbols 0, 1, 2, 3, 4, 5, 6, 7,

8 and 9. Each of these symbols is called a digit or a fi gure.

A number system involves counting in tens. When we speak of counting in tens, it simply means

that we are thinking of collections by tens. Ten is called the base of the system.

In our number system:

Ten ‘units or ones’ make one ten

i.e. 10 × 1 = 10

Ten ‘tens’ make one hundred

i.e. 10 × 10 = 100

Ten ‘hundreds’ make one thousand

i.e. 10 × 100 = 1000 and so on.

place Value and face Value of a digit in a number

Let us consider the number 7302.

As the digit 7 occupies thousand’s place, the place (or local) value of the digit 7 = 7 × 1000

= 7000.

Knowing Our Numbers Worksheet With Answers