Mathematics
Grade-4-
Easy
Question
Use estimation and rounding to choose the appropriate answer for each problem:
A candy factory can manufacture 4,930 candy bars in a day. The factory can make about candy bars in 5 days
- 250
- 2,500
- 25,000
- 25,050
Hint:
ROUNDING
One very simple form of estimation is rounding. Rounding is often the key skill you need to quickly estimate a number. This is where you make a long number simpler by ‘rounding’, or expressing in terms of the nearest unit, ten, hundred, tenth, or a certain number of decimal places.
For example, 1,654 to the nearest thousand is 2,000. To the nearest 100 it is 1,700. To the nearest ten it is 1,650.
The correct answer is: 25,000
ROUNDING
One very simple form of estimation is rounding. Rounding is often the key skill you need to quickly estimate a number. This is where you make a long number simpler by ‘rounding’, or expressing in terms of the nearest unit, ten, hundred, tenth, or a certain number of decimal places.
For example, 1,654 to the nearest thousand is 2,000. To the nearest 100 it is 1,700. To the nearest ten it is 1,650
Total candy bars manufactured in one day = 4,930
Total candy bars manufactured in five days = 5 × 4930 = 24,650 
25,000 (Rounding off to its nearest thousands place)
Thus, the factory can make about 25,000 candy bars in 5 days.
Total candy bars manufactured in one day = 4,930
Total candy bars manufactured in five days = 5 × 4930 = 24,650
25,000 (Rounding off to its nearest thousands place)Thus, the factory can make about 25,000 candy bars in 5 days.
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