Add and subtract decimals

Front

What is a decimal?

Back

A decimal is a way of representing numbers that are not whole numbers, using a point (.) to separate the whole part from the fractional part.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the answer directly below the other decimal points.

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, placing the decimal point in the answer directly below the other decimal points.

Front

What is the value of 8 - 4.00?

Back

4.00

Front

What is the value of 10.00 - 7.85?

Back

2.15

Front

What is the value of 3 + 4.5?

Back

7.5

Front

What is the value of 67.80 + 5?

Back

72.8

Front

What is the value of 67.8 - 54.09?

Back

13.71

Front

What does it mean to round a decimal?

Back

Rounding a decimal means adjusting the number to a nearby value that is easier to work with, often to a certain number of decimal places.

Front

What is the place value of the digit 5 in 3.45?

Back

The place value of 5 in 3.45 is in the hundredths place.