Topic 3 Flashcard #2 Review

Front

What is estimation in mathematics?

Back

Estimation is a method used to find an approximate value rather than an exact answer.

Front

How do you estimate the product of 36 x 69?

Back

You can round 36 to 40 and 69 to 70, then multiply: 40 x 70 = 2800.

Front

What is 40 x 10²?

Back

4000.

Front

Why do we estimate numbers?

Back

Estimating makes math calculations easier.

Front

What is rounding?

Back

Rounding is replacing a number with a number that tells about how many or how much.

Front

What is the product of 20 x 30?

Back

600.

Front

What is the purpose of estimation?

Back

To simplify calculations and make them quicker.

Front

What does it mean to round a number?

Back

To change a number to the nearest ten, hundred, etc., to make it easier to work with.

Front

What is the estimated product of 30 x 70?

Back

2100.

Front

What is the difference between estimating and calculating?

Back

Estimating gives an approximate answer, while calculating gives an exact answer.