Adding and Subtracting Decimals with Models

Front

What is a decimal?

Back

A decimal is a number that has a whole part and a fractional part, separated by a decimal point. For example, 3.14 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

What is the value of 0.5 + 0.3?

Back

0.5 + 0.3 = 0.8

Front

What is the value of 1.2 - 0.7?

Back

1.2 - 0.7 = 0.5

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. For example, in 3.45, the 4 is in the tenths place.

Front

What is the shaded part of a model that shows 0.9?

Back

0.9 represents nine-tenths of a whole.

Front

How do you represent subtraction with a model?

Back

A model for subtraction often shows a whole and a part being taken away, illustrating the remaining amount.

Front

What is the sum of 4.18 and 3.11?

Back

4.18 + 3.11 = 7.29

Front

What is the difference between addition and subtraction?

Back

Addition combines two or more numbers to get a total, while subtraction takes one number away from another.

Front

What is the value of 0.7 + 0.44?

Back

0.7 + 0.44 = 1.14