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 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 35.61 + 12.93?

Back

48.54

Front

What is the difference of 18 - 3.55?

Back

14.45

Front

What is the difference between Tamara's jump of 17.6 feet and the world record of 39.3 feet?

Back

21.7 feet

Front

What is 5.4 - 2.43?

Back

2.97

Front

What is the sum of 1.70 + 4.65?

Back

6.35

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 7 in 3.47?

Back

The place value of 7 in 3.47 is in the hundredths place.