I am learning about estimating sums and differences. One of the questions is brigid worked 16.75 h. Kevin worked 12.50 h. About how many more hours did Brigid work than Kevin.

Question

Conner Baxter

Mathematics

16 November, 19:01

I am learning about estimating sums and differences. One of the questions is brigid worked 16.75 h. Kevin worked 12.50 h. About how many more hours did Brigid work than Kevin.

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Answers (1)

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Lizbeth Braun · Answer 1

Brigid worked 16.75 hr

Kevin worked 12.50 hr

Round to the nearest whole number by looking if the tenths are greater than 5

Round up Brigid to 17 hrs because 7 is greater than or equal to 5

Round up Kevin to 13 hrs because 5 is greater than or equal to 5

Subtract their times

17-13 = 4 hrs

Comparing it to the original answer (if we didn't estimate) of 4.25, it is pretty close and 4 hrs is a good estimate