Chapter: 4th Maths : Term 3 Unit 5 : Money
Finding the estimation of the total cost
Note: If the paise is more than 50 or equal to 50 add 1 to the previous digit, if it is less than 50 keep the previous digit as it is.
Tharun went to footwear shop with his father. A pair of footwear cost ₹ 99.50 in the price tag.
Tharun :
Appa, what is the cost of the footwear?
Appa :
₹ 100
Tharun :
Appa, the price tag shows ₹ 99.50 but you said ₹ 100.
Appa :
Yes tharun. The amount ₹ 99.50 is difficult to tell. So I rounded off to ₹ 100.
Tharun :
Appa, why don’t you say ₹ 99 instead of ₹ 100?
Appa :
Yes, here the amount is ₹ 99.50. If the amount is more than or equal to 50 paise, round to the nearest value.
Tharun :
Appa, Suppose if the amount is less than 50 paise, then keep the value as it is leaving the 50 paise?
Appa :
Yes Tharun, you are correct. (They bought, footwear and went happily)
To measure the money accurately, we can use the approximation
The approximate value of ₹ 1 is the whole number of before or after.
Let us try
Estimate the following rupees (before or after) using the multiples of ₹ 10.
Deepak bought groundnut cookies for ₹ 24.40, Dhal mixture for ₹ 34.60 and murukku for ₹ 28.75. He prepared to estimate the value to the nearest rupees.
