Question

Topic
multiplication of Decimal

Objective
To find the product of the given decimal

pre-requisite knowledge
1. Representation of decimals
2. Multiplication of numbers

procedure
1. Let us assume that we wish to multiply 0.6 and 0.5
2. Represent 0.6 horizontally and 0.5 vertically on two different O. H. P. as shown in the figures given below
​

Answer 1

(i) Remove the decimals of the two numbers and then take the two numbers as whole numbers and multiply. ii) In the product, place the decimal point after leaving digits equal to the total number of decimal places in both numbers.

(iii) Counting must always be done from the units place of the product.


Let us consider some of the following examples on multiplication of a decimal number by a decimal number.

1. Find the product of 1.2 × 1.2

First we will perform the multiplication ignoring the decimal points in multiplicant and multiplier.

Multiplication of a Decimal by a Decimal




Since 12 × 12 = 144

Now place the decimal point in the product to give as many decimal places in the product as there are in the multiplicant and the multiplier together.

Therefore, 1.2 × 1.2 = 1.44

Multiplication of a Decimal by a Decimal