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 result of 5.72 - 3.55?

Back

2.17

Front

What is the result of 46.4 - 41.745?

Back

4.655

Front

If Chicago was predicted to receive 1.254'' of rain and actually received .875'', how far was the prediction off?

Back

.379''

Front

What is the result of 13.16 + 5.90?

Back

19.06

Front

How do you find the difference between two decimal numbers?

Back

Subtract the smaller number from the larger number to find the difference.

Front

What is the result of 51.25 - 46.65?

Back

4.60

Front

What is the importance of aligning decimal points when adding or subtracting?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.