Estimate Sums & Differences

Front

What is estimation in math?

Back

Estimation is a way to find an approximate value that is close to the exact answer, often used to make calculations easier.

Front

How do you estimate a sum to the nearest ten?

Back

Round each number to the nearest ten and then add them together.

Front

Estimate the sum: 312 + 456 (to the nearest ten).

Back

310 + 460 = 770.

Front

What is the nearest hundred?

Back

The nearest hundred is the multiple of 100 that is closest to a given number.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

Estimate the difference: 793 - 328 (to the nearest hundred).

Back

800 - 300 = 500.

Front

How do you estimate a difference to the nearest hundred?

Back

Round each number to the nearest hundred and then subtract.

Front

Estimate the difference: 749 - 362 (to the nearest hundred).

Back

700 - 400 = 300.

Front

What is rounding?

Back

Rounding is adjusting a number to make it simpler while keeping its value close to what it was.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

Estimate the sum: 826 + 475 (to the nearest hundred).

Back

800 + 500 = 1300.

Front

What is the purpose of estimating in math?

Back

Estimating helps to quickly check if an answer is reasonable and to simplify calculations.