Rounding and Estimation Mega Flashcard

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 whole number, tenth, hundredth, etc.

Front

What does it mean to estimate?

Back

Estimating means finding a number that is close enough to the right answer, often used for quick calculations.

Front

How do you round a number to the nearest ten?

Back

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 34 to the nearest ten.

Back

30

Front

Round 78 to the nearest ten.

Back

80

Front

What is the nearest hundredth?

Back

The nearest hundredth is the second digit to the right of the decimal point.

Front

Round 3.456 to the nearest hundredth.

Back

3.46

Front

What is the nearest tenth?

Back

The nearest tenth is the first digit to the right of the decimal point.

Front

Round 5.67 to the nearest tenth.

Back

5.7

Front

How do you estimate the sum of two numbers?

Back

Round each number to a convenient value and then add those rounded numbers.