Round 78 to the nearest ten.
Understand the Problem
The question is asking for the number 78 to be rounded to the nearest ten. This involves identifying the nearest multiple of ten to 78, which requires understanding how rounding works.
Answer
$80$
Answer for screen readers
The number 78 rounded to the nearest ten is $80$.
Steps to Solve
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Identify the nearest multiples of ten Look at the number 78. The nearest multiples of ten are 70 and 80.
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Determine which multiple is closer To check which multiple is closer to 78, calculate the distance to each multiple:
- Distance to 70: $78 - 70 = 8$
- Distance to 80: $80 - 78 = 2$
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Decide based on the distances Since 2 (distance to 80) is less than 8 (distance to 70), 78 is closer to 80.
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Round the number Thus, when rounding 78 to the nearest ten, we round it up to 80.
The number 78 rounded to the nearest ten is $80$.
More Information
Rounding is a common method used in mathematics to simplify numbers. It can make calculations easier and results cleaner. Knowing how to round to the nearest ten can be particularly useful in estimating sums or data.
Tips
- A common mistake is to round down to the nearest multiple of ten without considering the proximity. Always calculate distances to both the lower and upper multiples before deciding.
- Another mistake could be rounding to a completely different multiple (like 100) if unsure. Make sure to only consider the nearest multiples.
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