Decimal Operations & Word Problems

Front

What is a decimal?

Back

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 3.14 is a decimal.

Front

How do you estimate the sum of two decimals?

Back

To estimate the sum, round each decimal to the nearest whole number and then add them together.

Front

Estimate the sum: 43.53 + 27.67

Back

70

Front

What is the process to estimate the difference of two decimals?

Back

To estimate the difference, round each decimal to the nearest whole number and then subtract the smaller number from the larger number.

Front

Estimate the difference: 20.11 - 13.27

Back

10

Front

What is the total cost if you buy 3 adult tickets at $18.00 each and 2 children's tickets at $16.50 each?

Back

$54.00 (3 x 18.00 + 2 x 16.50 = 54.00)

Front

How do you add decimals?

Back

Align the decimal points and add as you would with whole numbers, placing the decimal point in the answer directly below the other decimal points.

Front

Calculate: 43.53 + 27.67

Back

71.20

Front

How do you subtract decimals?

Back

Align the decimal points and subtract as you would with whole numbers, placing the decimal point in the answer directly below the other decimal points.

Front

Calculate: 20.11 - 13.27

Back

6.84