Estimating Quotients

Front

What is estimation in division?

Back

Estimation in division is the process of finding an approximate value of a quotient by rounding the numbers to make calculations easier.

Front

What does it mean for numbers to be 'friendly' for estimation?

Back

'Friendly' numbers are those that are easy to work with, often rounded to the nearest ten, hundred, or other convenient value.

Front

How do you round 680 to make it friendly for estimation?

Back

680 can be rounded to 680 or 700, but for division by 10, it is best to use 680.

Front

What is the friendly number for 4000 when dividing by 20?

Back

4000 is already a friendly number for division by 20.

Front

Why is 5400 ÷ 60 a better choice than 5800 ÷ 60 for estimation?

Back

5400 is closer to a multiple of 60, making it easier to estimate.

Front

What is the result of estimating 490 ÷ 7?

Back

490 ÷ 7 is approximately 70.

Front

How do you estimate 640 ÷ 8?

Back

640 ÷ 8 can be estimated as 80.

Front

What is the process of rounding numbers for estimation?

Back

The process involves identifying the nearest ten, hundred, or other base to simplify calculations.

Front

What is the importance of estimation in math?

Back

Estimation helps to quickly assess the reasonableness of answers and simplifies complex calculations.

Front

What is a common strategy for estimating quotients?

Back

A common strategy is to round the dividend and divisor to the nearest friendly number.