Adding & Subtracting Decimals Word Problems

Front

What is a decimal?

Back

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 2.5 is a decimal.

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 rounding in decimal operations?

Back

Rounding helps simplify numbers to make calculations easier and to express answers in a more manageable form, especially when dealing with measurements.

Front

If Kyle had 4 yards of string and used 1.3 yards, how do you find the length left?

Back

Subtract the used length from the total length: 4.0 - 1.3 = 2.7 yards.

Front

Maya bought items for $32.78 and paid with $40.00. How do you find her change?

Back

Subtract the total cost from the amount paid: 40.00 - 32.78 = 7.22, so she should receive $7.22.

Front

How do you calculate the total cost of multiple items?

Back

Add the cost of each item together. For example, if Scott bought 2 apples at $1.13 each and a juice for $1.76, the total cost is (2 * 1.13) + 1.76.

Front

What is the process to find out how much money is left after spending?

Back

Subtract the total spent from the initial amount. For example, if Josh had $15.00 and spent $13.75, he has 15.00 - 13.75 = 1.25 left.

Front

How do you round a decimal to the nearest tenth?

Back

Look at the hundredths place. If it is 5 or more, round up the tenths place by one. If it is less than 5, keep the tenths place the same.

Front

What is the sum of 13.2 and 13.54 rounded to the nearest tenth?

Back

First, add the numbers: 13.2 + 13.54 = 26.74. Then round to the nearest tenth: 26.74 rounds to 26.7.