Estimate Decimals

Front

What is the process of estimating a subtraction problem using compatible numbers?

Back

To estimate a subtraction problem using compatible numbers, round each number to the nearest whole number or a number that makes the subtraction easier. For example, for 53.87 - 3.56, round to 54 - 4, which equals 50.

Front

How do you round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the digit in the hundredths place. If it is 5 or greater, round up the tenths place by one. If it is less than 5, keep the tenths place the same.

Front

What is the estimated sum of 8.21 and 9.88 when rounded to the nearest whole number?

Back

The estimated sum of 8.21 and 9.88 is 18, as 8.21 rounds to 8 and 9.88 rounds to 10.

Front

How do you round a number to the nearest hundredth?

Back

To round a number to the nearest hundredth, look at the digit in the thousandths place. If it is 5 or greater, round up the hundredths place by one. If it is less than 5, keep the hundredths place the same.

Front

What is the estimated difference of 9.22 and 3.88?

Back

The estimated difference of 9.22 and 3.88 is 5, as 9.22 rounds to 9 and 3.88 rounds to 4.

Front

Define compatible numbers in the context of estimation.

Back

Compatible numbers are numbers that are easy to compute mentally. They are often rounded to make calculations simpler, especially in estimation.

Front

What is the importance of rounding in estimation?

Back

Rounding is important in estimation because it simplifies calculations, making it easier to quickly find approximate answers without exact calculations.

Front

How do you determine which place value to round to when estimating?

Back

The place value to round to depends on the context of the problem. For example, if estimating for money, you might round to the nearest cent (hundredth), while for general calculations, rounding to the nearest whole number may suffice.

Front

What is the estimated value of 53.87 when rounded to the nearest whole number?

Back

The estimated value of 53.87 when rounded to the nearest whole number is 54.

Front

What is the estimated value of 3.56 when rounded to the nearest whole number?

Back

The estimated value of 3.56 when rounded to the nearest whole number is 4.