Adding and Subtracting Decimals with Models

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.

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

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.

Tags

CCSS.6.NS.B.3

Front

What is the sum of 12.34 and 9.56?

Back

The sum is 21.90.

Tags

CCSS.6.NS.B.3

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.

Tags

CCSS.5.NBT.B.7

Front

What is 0.27 - 0.09?

Back

The answer is 0.18.

Tags

CCSS.5.NBT.B.7

Front

What does it mean to 'shade' a model in decimals?

Back

Shading a model represents a part of a whole, showing the value of a decimal visually.

Tags

CCSS.4.NF.C.6

Front

What is the decimal representation of 183?

Back

The decimal representation is 183.0.

Tags

CCSS.4.NF.C.6

Front

What is 0.19 + 0.42?

Back

The answer is 0.61.

Tags

CCSS.5.NBT.B.7

Front

What is the difference between 0.9 and 0.27?

Back

The difference is 0.63.

Tags

CCSS.5.NBT.B.7

Front

How do you represent 1.83 in a model?

Back

1.83 can be represented by shading 1 whole and 83 hundredths in a model.

Tags

CCSS.4.NF.C.6