Usage of decimals in money — lesson. Mathematics CBSE, Class 6.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Meena went to a store to buy toothpaste. The cost of toothpaste is $20$ $rupees$ and $50$ $paise$ . She doesn't know what cost is this.

Do you know the cost of the toothpaste?

We will help her to find the cost of the toothpaste.

Let us first convert

$paise$ to

$rupees$ .

$100$

$paise$

$=$

$₹1$ .

$1$

$paise$

$=$

$₹$

$\frac{1}{100}$ .

$50$

$paise$

$=$

$\frac{50}{100}$

$=$

$₹0.50$ .

Now, add

$₹20$ with

$₹0.50$ .

$20$

$rupees$

$+$

$50$

$paise$ .

$\begin{array}{l} 20.00 \\ \underline{+ 0.5 0} \\ 20.5 0 \end{array}$

So, the cost of toothpaste is

$₹20.50$ .

To convert paise to rupees, divide the paise by

$100$ .

To convert rupees to paise, multiply the rupees by

$100$ .

Example:

1. Convert

$75$

$paise$ to

$rupees$ .

$1$

$paise$

$=$

$₹$

$\frac{1}{100}$ .

$75$

$paise$

$=$

$₹$

$\frac{1}{100} \times 75$

$=$

$₹0.75$

Therefore,

$75$

$paise$

$=$

$₹0.75$ .

2. Convert

$₹5$

$rupees$ to

$paise$ .

$₹1$

$=$

$100$

$paise$

$₹5$

$=$

$5 \times 100$

$=$

$500$

$paise$

Therefore,

$₹5$

$=$

$500$

$paise$ .

Multiply a decimal number by

$10$ :

Move the decimal point in the product by one place to the right.

Multiply a decimal number by

$100$ :

Move the decimal point in the product by two places to the right.

Multiply a decimal number by

$1000$ :

Move the decimal point in the product by three places to the right.

Example:

1. Convert

$₹4.76$

$rupees$ to

$paise$ .

$₹1$

$=$

$100$

$paise$ .

$₹4.76$

$=$

$4.76 \times 100$

$=$

$476.00$

$paise$ .

Therefore,

$₹4.76$

$=$

$476$

$paise$ .

2. Convert

$₹10.80$

$rupees$ to

$paise$ .

$₹1$

$=$

$100$

$paise$ .

$₹10.80$

$=$

$10.80 \times 100$

$=$

$1080.00$

$paise$ .

Therefore,

$₹10.80$

$=$

$1080$

$paise$ .

Important!

$₹1$

$=$

$100$

$paise$ .

$1$

$paise$

$=$

$₹$

$\frac{1}{100}$

$=$

$₹0.01$ .

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1. Usage of decimals in money

Theory: