Adding and subtracting decimal numbers

Front

What is a decimal number?

Back

A decimal number is a number that includes a decimal point, which separates the whole number part from the fractional part.

Front

How do you add decimal numbers?

Back

To add decimal numbers, align the numbers by the decimal point and add each column starting from the right.

Front

How do you subtract decimal numbers?

Back

To subtract decimal numbers, align the numbers by the decimal point and subtract each column starting from the right.

Front

What is the sum of 6.4 and 1.75?

Back

8.15

Front

What is 503.2 - 421.0?

Back

82.2

Front

What is 6.98 - 0.034?

Back

6.946

Front

If Madison practiced 5.75 hours one week and 4.2 hours the next, what is the difference in practice time?

Back

1.55 hours

Front

What is the total mileage of Sarah's car before March if it was 65,470.5 miles after driving 3,219.2 miles?

Back

62,251.3 miles

Front

Why is it important to line up decimal points when adding or subtracting?

Back

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

Front

What is the place value of the digit 5 in the number 12.345?

Back

The place value of 5 is in the thousandths place.