Add 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, 3.5 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 with whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

What is the value of the decimal 0.7?

Back

The value of 0.7 is seven-tenths, which means 7 out of 10 parts.

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What does it mean to round a decimal?

Back

Rounding a decimal means adjusting it to a nearby value that is simpler or easier to work with, often to a certain number of decimal places.

Front

If you add 0.25 and 0.75, what is the sum?

Back

The sum of 0.25 and 0.75 is 1.00.

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What is a model in mathematics?

Back

A model in mathematics is a visual representation that helps to understand and solve problems, such as using blocks or drawings to represent decimal values.

Front

How can you represent 0.5 using a model?

Back

0.5 can be represented using a model by showing a whole divided into two equal parts, with one part shaded to indicate half.

Front

What is the importance of the decimal point?

Back

The decimal point is important because it indicates the position of the whole number and fractional parts, determining the value of the number.

Front

What is the sum of 1.2 and 0.8?

Back

The sum of 1.2 and 0.8 is 2.0.

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How do you check your work when adding decimals?

Back

You can check your work by estimating the sum and ensuring your answer is close to that estimate.