Estimating Sums

Front

What is estimating sums?

Back

Estimating sums is the process of finding an approximate total by rounding numbers to a specific place value before adding them.

Front

How do you estimate the sum of 25,219 + 4,876?

Back

Round 25,219 to 25,000 and 4,876 to 5,000. The estimated sum is 25,000 + 5,000 = 30,000.

Front

What is the nearest thousand for 367,246 + 84,651?

Back

Round 367,246 to 367,000 and 84,651 to 85,000. The estimated sum is 367,000 + 85,000 = 452,000.

Front

Estimate the sum of 567 + 962 by rounding to the nearest hundred.

Back

Round 567 to 600 and 962 to 1,000. The estimated sum is 600 + 1,000 = 1,600.

Front

How do you estimate the sum of 437 + 37?

Back

Round 437 to 440 and 37 to 40. The estimated sum is 440 + 40 = 480.

Front

What is the estimated sum of 2,764 + 4,851?

Back

Round 2,764 to 3,000 and 4,851 to 5,000. The estimated sum is 3,000 + 5,000 = 8,000.

Front

What does it mean to round to the nearest ten?

Back

Rounding to the nearest ten means adjusting a number to the closest multiple of ten.

Front

What is the estimated sum of 1,234 + 567 when rounded to the nearest hundred?

Back

Round 1,234 to 1,200 and 567 to 600. The estimated sum is 1,200 + 600 = 1,800.

Front

How do you round 4,678 to the nearest thousand?

Back

Look at the hundreds place (6). Since it is 5 or more, round up to 5,000.

Front

What is the estimated sum of 3,456 + 2,345 when rounded to the nearest thousand?

Back

Round 3,456 to 3,000 and 2,345 to 2,000. The estimated sum is 3,000 + 2,000 = 5,000.