Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (decimal point) separating the whole number 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 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 2.98 and 5.3?

Back

8.28

Front

What is the difference between 9.43 and 3.34?

Back

6.09

Front

If Tamara jumps 17.6 feet and the world record is 39.3 feet, what is the difference?

Back

21.7 feet

Front

What is 55.78 + 4.6?

Back

60.38

Front

What is 7.05 - 4.6?

Back

2.45

Front

What does it mean to round a decimal?

Back

Rounding a decimal means adjusting its value to make it simpler while keeping it close to the original value, often to a specified place value.

Front

What is the place value of the digit 3 in 5.63?

Back

The place value of 3 in 5.63 is 'three hundredths' or 0.03.