Estimation using Compatible Numbers

Front

What are compatible numbers?

Back

Compatible numbers are numbers that are easy to compute with mentally. They are often rounded numbers that make calculations simpler.

Front

Estimate the quotient using compatible numbers: 3,129 ÷ 42

Back

80

Front

Estimate the quotient using compatible numbers: 7,301 ÷ 76

Back

90

Front

Estimate the quotient: 234 ÷ 41 = ?

Back

6

Front

Why do we use compatible numbers for estimation?

Back

We use compatible numbers to make calculations easier and quicker, especially when we need to estimate.

Front

What is the first step in estimating a division problem using compatible numbers?

Back

The first step is to round the numbers to the nearest compatible numbers that are easier to divide.

Front

Estimate the quotient using compatible numbers: 1,250 ÷ 25

Back

50

Front

Estimate the quotient using compatible numbers: 1,800 ÷ 36

Back

50

Front

What is the compatible number for 42 when estimating 3,129 ÷ 42?

Back

40 is a compatible number for 42.

Front

Estimate the quotient using compatible numbers: 5,600 ÷ 70

Back

80