Question

Express as rupees using decimals.
A. 5 paise
B. 75 paise
C. 20 paise
D. 50 rupees and 90 paise
E. 725 paise

Answer 1

Hint: As we know that 1 rupee is equal to 100 paise. So we will use this to convert all the given paise into rupees by simply using a unitary method.

Complete step-by-step answer:
We will express as rupees using decimals one by one as follows:
A. We have been given 5 paise.
As we know that 100 paise = rupee 1
So, 1 paisa = Rs. \[\dfrac{1}{100}\]
Hence, 5 paise = rupees \[5\times \dfrac{1}{100}\] = Rs. \[\dfrac{5}{100}\] = Rs. 0.05
Therefore, in decimals 5 paise = Rs. 0.05.
B. We have been asked to express 75 paise in rupees using decimals.
As we know that 100 paise = Re. 1
So, 1 paisa = Rs. \[\dfrac{1}{100}\]
Hence, 75 paise = Rs. \[75\times \dfrac{1}{100}\] = Rs. \[\dfrac{75}{100}\] = Rs. 0.75
Therefore, in decimal 75 paise = Rs. 0.75.
C. We have been asked to express 20 paise in rupees using decimals.
As we know that 100 paise = Re. 1
So, 1 paisa = Rs. \[\dfrac{1}{100}\]
Hence, 20 paise = Rs. \[20\times \dfrac{1}{100}\] = Rs. \[\dfrac{20}{100}\] = Rs. 0.2
Therefore, in decimal 20 paise = Rs. 0.2.
D. We have been asked to express 50 rupees 90 paise in rupees using decimals.
As we know that 100 paise = Re. 1
So, 1 paisa = Rs. \[\dfrac{1}{100}\]
Hence, 90 paise = Rs. \[90\times \dfrac{1}{100}\] = Rs. \[\dfrac{90}{100}\] = Rs. 0.9
So, 50 rupees 90 paise = Rs. (50 + 0.9) = Rs. 50.9
Therefore, in decimal 50 rupees 90 paise is equal to Rs. 50.9.
E. We have been asked to express 725 paise in rupees in decimal.
As we know that 100 paise = Re. 1
So, 1 paisa = Rs. \[\dfrac{1}{100}\]
Hence, 725 paise = Rs. \[725\times \dfrac{1}{100}\] = Rs. \[\dfrac{725}{100}\] = Rs. 7.25
Therefore, in decimal 725 paise is equal to Rs. 7.25.

Note: Be careful while doing calculation in each part of the question. Also, remember that rupees are denoted by Rs. The mistake that can be committed here is by not using step by step calculation and converting 5 paise as 0.5 rupees instead of 0.05 rupees. Also, whenever rupees and paise are given together, we have to convert them into 1 unit and then add them.