Drew ran a bake sale that made 108, 86, 101, and 52 dollars for the four nights of a school play. The school principal asks, "About how much did the snack bar make?" Drew estimates by rounding to the nearest 5 and adding.

1)
108 + 86 is about 110 + _____.

To estimate by rounding to the nearest 5, let's first round 86.

86 rounds to 85.

So, the estimation for:

- \( 108 + 86 \) is approximately \( 110 + 85 = 195 \).

Do you want more details or have any questions?

Here are 8 questions that build on this:

1. How do you round a number to the nearest 10?
2. What is the difference between rounding up and rounding down?
3. What is the exact sum of 108 + 86 without rounding?
4. How would you round 101 to the nearest 5?
5. What is the total amount made over the four nights before rounding?
6. How would you estimate the total by rounding all four amounts to the nearest 10?
7. If Drew had rounded to the nearest 10 instead of 5, what would the estimated sum be?
8. Why is rounding useful in estimation?

**Tip:** When rounding to the nearest 5, look at the last digit of the number. If it's 3 or lower, round down; if it's 7 or higher, round up!

Learn how to estimate the total snack bar sales from a school play by rounding each night's earnings to the nearest 5 and adding them up. This problem involves basic estimation techniques and is suitable for elementary school students in Grades 3-5.

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