Adding and Subtracting Decimals Word Problems

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 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.

Front

What is the sum of 39.05 grams and 56.7 grams?

Back

95.75 grams.

Front

How do you find the difference between two decimal numbers?

Back

To find the difference, subtract the smaller number from the larger number after aligning the decimal points.

Front

What is the difference in height between Lacy (51.25 inches) and Gerald (46.65 inches)?

Back

4.6 inches.

Front

How do you determine how much faster one time is compared to another?

Back

Subtract the faster time from the slower time to find the difference.

Front

If Timmy's first race time was 15.674 seconds and his second was 14.978 seconds, how much faster was he?

Back

0.696 seconds.

Front

What does it mean if one time is slower than another?

Back

It means that the second time takes longer to complete than the first time.