Michael buys five items in a shop. He estimates the total cost of his purchases by rounding each item to the nearest euro, and then adding the estimates. Complete the table to show Michael’s calculations. | Item | Actual Cost | Estimate (nearest euro) | |-----------|-------------|-------------------------| | Magazine | €2.80 | 3 | | Milk | €1.79 | 2 | | Banana | 34 cent | 0 | | Bread | €1.23 | 1 | | Biscuits | 79 cent | 1 | | Total | €6.95 | 7 | Find the difference between the actual total cost and Michael’s estimate of the total cost.

Junior Cycle Mathematics Number Systems: Michael buys five items in a sho

Michael buys five items in a shop - Junior Cycle Mathematics - Question 2 - 2014

Question 2

Michael buys five items in a shop. He estimates the total cost of his purchases by rounding each item to the nearest euro, and then adding the estimates. Complete t... show full transcript

Worked Solution & Example Answer:Michael buys five items in a shop - Junior Cycle Mathematics - Question 2 - 2014

Step 1

Estimate for Magazine

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Answer

Michael rounds €2.80 to the nearest euro, which is €3.

Step 2

Estimate for Milk

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Answer

Michael rounds €1.79 to the nearest euro, which is €2.

Step 3

Estimate for Banana

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Answer

Michael rounds 34 cents to the nearest euro, which is €0.

Step 4

Estimate for Bread

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Answer

Michael rounds €1.23 to the nearest euro, which is €1.

Step 5

Estimate for Biscuits

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Answer

Michael rounds 79 cents to the nearest euro, which is €1.

Step 6

Total of Estimated Costs

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Answer

The estimated total cost is €3 + €2 + €0 + €1 + €1 = €7.

Step 7

Find the Difference

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Answer

The actual total cost is €6.95. The difference between the actual total and the estimate is:

$7 - 6.95 = 0.05$ or 5 cents.

Step 8

The numbers in the table below were rounded using different methods.

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Answer

Number	Rounded number	Rounded to...
851.7	852	the nearest whole number
0.0026	0.003	three decimal places
798.798	798.8	one decimal place
12.342	12.34	two decimal places

Michael buys five items in a shop - Junior Cycle Mathematics - Question 2 - 2014

Worked Solution & Example Answer:Michael buys five items in a shop - Junior Cycle Mathematics - Question 2 - 2014

Estimate for Magazine

Estimate for Milk

Estimate for Banana

Estimate for Bread

Estimate for Biscuits

Total of Estimated Costs

Find the Difference

The numbers in the table below were rounded using different methods.

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