Estimation

Front

What is estimation?

Back

Estimation is a way of finding an approximate value or number that is close to the actual amount, often used when exact numbers are not necessary.

Front

How do you round a number to the nearest hundred?

Back

To round a number to the nearest hundred, look at the tens digit. If it is 5 or more, round up. If it is 4 or less, round down.

Front

Round 556 to the nearest hundred.

Back

600

Front

How do you round a number to the nearest ten?

Back

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

Front

Round 143 to the nearest ten.

Back

140

Front

What is the purpose of estimation in addition?

Back

Estimation in addition helps to quickly find an approximate total without calculating the exact sum.

Front

Estimate 32 + 49.

Back

80

Front

How can you estimate the total of two numbers?

Back

You can estimate the total of two numbers by rounding each number to the nearest ten or hundred and then adding those rounded numbers.

Front

Amy had 13 jelly beans and 28 jelly beans. Estimate how many jelly beans she had in all.

Back

40

Front

What is the importance of estimation in everyday life?

Back

Estimation helps in making quick decisions, budgeting, and checking the reasonableness of calculations.