Estimating Sums Flashcard

Front

What is estimating sums?

Back

Estimating sums is the process of finding an approximate total by rounding numbers to make calculations easier.

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's 5 or more, round up. If it's 4 or less, round down.

Front

Estimate the sum of 83 and 27 by rounding to the nearest tens.

Back

110

Front

Round 56 and 48 to the nearest tens and then find the estimated sum.

Back

110

Front

Estimate the sum of 67 and 38 by rounding to the nearest tens.

Back

110

Front

Estimate the sum of 75 + 48.

Back

130

Front

Estimate the sum of 68 + 35.

Back

110

Front

What is the nearest ten to 83?

Back

80

Front

What is the nearest ten to 27?

Back

30

Front

What is the nearest ten to 56?

Back

60