Adding and Subtracting Decimals Word Problems

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form. It uses a decimal point to separate the whole number part 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 the decimal point in calculations?

Back

The decimal point indicates the position of the digits in a number, determining their value. It is crucial for accurate addition and subtraction of decimal numbers.

Front

If Mrs. Hau has $20 and spends $2.15 and $6.58, how do you find out how much she has left?

Back

Subtract the total spent ($2.15 + $6.58 = $8.73) from the initial amount ($20 - $8.73 = $11.27).

Front

How do you find the total of two decimal measurements?

Back

Add the two measurements together, ensuring to align the decimal points. For example, 3.74 + 9.80 = 13.54.

Front

What does it mean to be 'off' in a prediction?

Back

Being 'off' means the difference between the predicted value and the actual value. For example, if the prediction was 1.254'' and the actual was 0.875'', the difference is 0.379''.

Front

How do you calculate change after a purchase?

Back

To calculate change, subtract the total cost of the items from the amount given. For example, if Ms. Stigall spends $61.18 and gives $100, her change is $100 - $61.18 = $38.82.

Front

What is a budget?

Back

A budget is a plan that outlines how much money is available to spend and how it will be allocated to different expenses.

Front

How do you determine how much money is left after multiple purchases?

Back

Subtract the total amount spent from the initial amount. For example, if you start with $100 and spend $27.99 and $25.99, you calculate $100 - ($27.99 + $25.99) = $46.02.