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 decimal point. For example, 0.5 is a decimal that represents 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 importance of place value in decimals?

Back

Place value determines the value of each digit in a decimal number. For example, in 0.75, the 7 is in the tenths place and the 5 is in the hundredths place.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator. For example, 1/4 = 0.25.

Front

What is the first step in solving a word problem involving decimals?

Back

The first step is to read the problem carefully and identify what is being asked.

Front

How do you determine what operation to use in a word problem?

Back

Look for keywords: 'total' or 'combined' suggests addition, while 'less than' or 'remaining' suggests subtraction.

Front

What is the combined weight of two samples weighing 39.05 grams and 56.7 grams?

Back

95.75 grams.

Front

If it rained 0.72 inches on Monday and 0.34 inches less on Tuesday, how much did it rain on Tuesday?

Back

0.38 inches.

Front

Judith had $93.13 worth of oranges and $36.23 left. How much did she start with?

Back

$129.36.