Adding and Subtracting Decimals with Models

Front

What is a decimal?

Back

A decimal is a number that represents a part of a whole, using a dot (.) to separate 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 answer 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 answer directly below the other decimal points.

Front

What does the term 'place value' mean?

Back

Place value refers to the value of a digit based on its position in a number, such as tenths, hundredths, etc.

Front

What is the value of 0.9 in fraction form?

Back

0.9 is equivalent to 9/10.

Front

What is the shaded part in a model?

Back

The shaded part in a model represents a specific decimal value based on the total area of the model.

Front

What does it mean if a model represents addition?

Back

If a model represents addition, it shows combining two or more quantities to find a total.

Front

What does it mean if a model represents subtraction?

Back

If a model represents subtraction, it shows taking away one quantity from another.

Front

How can you represent 1.83 using a model?

Back

1.83 can be represented using a model that shows 1 whole and 83 hundredths.

Front

What is the result of 0.27 - 0.09?

Back

The result of 0.27 - 0.09 is 0.18.