Rounding

Front

What is rounding?

Back

Rounding is the process of adjusting a number to make it simpler and easier to work with, usually to the nearest ten, hundred, or other place value.

Front

What does it mean to round to the nearest ten?

Back

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

Front

How do you round the number 45?

Back

45 rounds to 50 because it is closer to 50 than to 40.

Front

What is the rule for rounding numbers ending in 5?

Back

If a number ends in 5, you round up to the next whole number.

Front

Estimate the sum of 64 + 32 by rounding each number to the nearest ten.

Back

64 rounds to 60 and 32 rounds to 30, so the estimated sum is 60 + 30 = 90.

Front

What is the estimated total of 55 Popsicles and 97 ice creams when rounded?

Back

55 rounds to 60 and 97 rounds to 100, so the estimated total is 60 + 100 = 160.

Front

Which is a better estimate for the sum of 644 + 175?

Back

644 rounds to 640 and 175 rounds to 200, so the estimated sum is 640 + 200 = 840.

Front

What is the nearest ten to the number 92?

Back

92 rounds to 90.

Front

If you have the number 784, what is it rounded to the nearest hundred?

Back

784 rounds to 800.

Front

What is the estimated sum of 907 + 327 when rounded?

Back

907 rounds to 900 and 327 rounds to 300, so the estimated sum is 900 + 300 = 1200.