Math Problem Statement
Estimate the sum. Round each number to the nearest whole number, then add.
5 1 6 + 8 5 6
The sum is approximately .
Solution
To estimate the sum of these two numbers, we round each number to the nearest whole number and then add.
Step 1: Round each number to the nearest whole number
- 5.16 rounds to 5.
- 8.56 rounds to 9.
Step 2: Add the rounded numbers
Conclusion:
The estimated sum is approximately 14.
Let me know if you need further explanation or have any questions!
Here are some follow-up questions to help you explore rounding and estimation more deeply:
- How do you decide whether to round a number up or down?
- Can you estimate sums involving decimals to the nearest tenth?
- How would you estimate the difference between two decimal numbers?
- What is the purpose of rounding in everyday life?
- How do you estimate products and quotients using rounding?
Tip: When rounding, if the decimal part is 0.5 or higher, round up; if it’s less than 0.5, round down.
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Math Problem Analysis
Mathematical Concepts
Rounding
Estimation
Addition
Formulas
Round each number to the nearest whole number
Add the rounded numbers
Theorems
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Suitable Grade Level
Grades 4-6
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Estimation and Rounding: Sum of 75.82 + 37.92 + 14.69 + 45.98 + 28.91 + 49.87