Estimation 5.3A

Front

What are compatible numbers?

Back

Compatible numbers are pairs of numbers that are easy to add, subtract, multiply, or divide mentally. They are used in estimation to approximate calculations.

Front

Estimate: 916 x 42 = ?

Back

36,000

Front

What is compensation in estimation?

Back

Compensation is a method for adjusting an estimate to draw closer to an exact calculation.

Front

What does the term 'whole number' mean?

Back

Whole numbers are any of the numbers {0, 1, 2, 3, ...} etc.

Front

A baby drank 13 ounces of milk in the morning and 8 ounces in the afternoon. About how many total ounces did the baby drink?

Back

20 ounces

Front

What is estimation?

Back

Estimation is the process of finding an approximate value that is close to the actual value.

Front

Why do we use compatible numbers?

Back

We use compatible numbers to make mental calculations easier and faster.

Front

What is rounding?

Back

Rounding means making a number lesser or greater but keeping its value close to what it was.

Front

Estimate: 1,234 + 567 = ?

Back

1,800

Front

What is the purpose of estimation in math?

Back

The purpose of estimation is to quickly find an approximate answer without calculating the exact value.