Rounding, Sums, and Differences

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

How do you round a number to the nearest ten?

Back

To round a number to the nearest ten, look at the digit in the ones place. If it is 5 or more, round up. If it is 4 or less, round down.

Front

Round 546 to the nearest ten.

Back

550

Front

What is the difference between two numbers?

Back

The difference is the result of subtracting one number from another.

Front

Estimate the difference: 546 - 209 by rounding to the nearest ten.

Back

340

Front

Round 94 to the nearest ten.

Back

90

Front

Round 1,528 to the nearest hundred.

Back

1,500

Front

Estimate the difference: 642 - 137 by rounding to the nearest ten.

Back

500

Front

Round 61 to the nearest ten.

Back

60

Front

Estimate the difference: 61 - 23 by rounding to the nearest ten.

Back

40