Estimate the Sum

Mrs. Taylor teaches students how to round numbers to estimate sums, a useful skill for mental math and real-life applications like budgeting. The lesson includes step-by-step instructions and example problems involving cookies, pumpkin seeds, and festival attendees. Students learn to round numbers to the nearest tens, hundreds, and thousands, and then add them to find an estimated sum.

Why is it useful to learn how to round numbers when estimating sums?

• To avoid using a calculator

• To easily add numbers in your head

• To make calculations more complex

• To spend more money

What is the first step in estimating the sum of two numbers?

• Subtract the numbers

• Multiply the numbers

• Round each number

• Add the numbers directly

If you have 24 and 36, what are the rounded numbers to the nearest ten?

• 20 and 30

• 25 and 35

• 20 and 40

• 30 and 40

How many cookies are estimated to be on the dessert table after rounding?

• 80 cookies

• 50 cookies

• 60 cookies

• 70 cookies

What is the estimated sum of pumpkin seeds from Ashley and Carson's pumpkins?

• 300 seeds

• 400 seeds

• 500 seeds

• 600 seeds

When rounding 3,578 to the nearest thousand, what is the result?

• 3,000

• 5,000

• 3,500

• 4,000

Approximately how many people attended the Fall Festival on both days?

• 8,000 people

• 9,000 people

• 11,000 people

• 10,000 people