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Numbers till 1000

Numbers on abacus

Abacus: a simple device for calculating, consisting of a frame with rows of wires or grooves along which beads are slid.

Here is shown an abacus with 3 sticks.

Each stick has some beads in it.

Starting from the left, the numbers of beads show the

numbers of Hundreds, tens and ones.

The abacus on the left shows

123 which is read as one hundred and twenty threee.

Numbers till 1000

Place value and Face value
The place value of a digit in a number is the value it holds to be at the place in the number.

The face value of a digit in a number is numerical value of the digit itself.

Let us take a 3-digit number 155

Numbers till 1000

Place value and Face value
The place value of a digit in a number is the value it holds to be at the place in the number.

The face value of a digit in a number is numerical value of the digit itself.

Let us take a 3-digit number 155

Numbers till 1000

Expanded form and Short form

In expanded form of a number, the number is shown according to the

place values of its digits.

This is shown here:

In 180, the place values of the digits are given below:

Expanded form: 180 = 100 + 80 + 0

In short form of a number the number is shown according to the face val

ue of its digits. Example: 100 + 80 + 0 = 180