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Question

Nini works at wage of $8.80 per hour in a pottery shop. She has worked for 24.6 hours in a week. Estimate her earnings in that week.

A
$220
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B
$225
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C
$250
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D
None of these
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Solution

The correct option is B $225
Nini's wage per hour =8.80

Total hours worked in the week=24.6

Week's earning=8.80×24.6

To estimate the product 8.80×24.6 we need to estimate 8.80 and 24.6 to nearest natural number.

For estimation to nearest natural number we look at tenths place and follow the estimation rule

Rule: If the digit is 5 or greater than 5 we round up, if the digit is less than 5 we round down.

8.80 has 8 at tenths place, it rounds up to 9
Similary,
24.6 has 6 at tenths place, it rounds up to 25
So, 8.80×24.6=9×25=225

Shivani's estimated earning of the week is $225

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