Decimal Operations

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form. It represents a part of a whole number using a decimal point, such as 0.5 or 3.14.

Front

How do you add decimals?

Back

To add decimals, line up the decimal points and add the numbers as you would with whole numbers.

Front

How do you subtract decimals?

Back

To subtract decimals, line up the decimal points and subtract the numbers as you would with whole numbers.

Front

What is the difference between 20.00 kg and 16.87 kg?

Back

The difference is 3.13 kg.

Front

If a bike trail is 8.54 miles long, how far is it after riding around 4 times?

Back

The total distance is 34.16 miles.

Front

If one app is 8.63 kb and the total is 17.73 kb, how big is the other app?

Back

The other app is 9.1 kb.

Front

What is the current speed if increasing by 4.6 mph results in 19.3 mph?

Back

The current speed is 14.7 mph.

Front

What do you do when multiplying decimals?

Back

When multiplying decimals, multiply the numbers as if they were whole numbers, then count the total number of decimal places in both factors to place the decimal in the product.

Front

What is the rule for dividing decimals?

Back

To divide decimals, move the decimal point in the divisor to make it a whole number, and move the decimal point in the dividend the same number of places.

Front

What is a common mistake when adding decimals?

Back

A common mistake is not lining up the decimal points before adding.