Add and Subtract Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal representation of 5/10.

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 sum 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 difference directly below the other decimal points.

Front

What is the sum of 0.5 and 0.3?

Back

0.5 + 0.3 = 0.8

Front

What is the difference between 2.5 and 1.2?

Back

2.5 - 1.2 = 1.3

Front

How do you round a decimal to the nearest whole number?

Back

To round a decimal to the nearest whole number, look at the digit to the right of the decimal point. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What is 7.05 - 4.6?

Back

7.05 - 4.6 = 2.45

Front

What is 2 - 0.43?

Back

2 - 0.43 = 1.57

Front

What is 86.04 + 4.04?

Back

86.04 + 4.04 = 90.08

Front

What is the sum of 3.35, 1.4, and 3.65?

Back

3.35 + 1.4 + 3.65 = 8.4