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

5+9=145 + 9 = 14

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:

  1. How do you decide whether to round a number up or down?
  2. Can you estimate sums involving decimals to the nearest tenth?
  3. How would you estimate the difference between two decimal numbers?
  4. What is the purpose of rounding in everyday life?
  5. 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