Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal representation of 5/10.

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.

Tags

CCSS.5.NBT.B.7

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.

Tags

CCSS.5.NBT.B.7

Front

What is the sum of 135.62 and 58.90?

Back

The sum is 194.52.

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CCSS.6.NS.B.3

Front

What is 80.93 - 68?

Back

The result is 12.93.

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CCSS.6.NS.B.3

Front

If Jeff had $58.90 and withdrew $25.00, how much does he have left?

Back

He has $33.90 left.

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CCSS.6.NS.B.3

Front

What is 55.78 + 4.6?

Back

The sum is 60.38.

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CCSS.6.NS.B.3

Front

What is 7.9 - 3.47?

Back

The result is 4.43.

Tags

CCSS.5.NBT.B.7

Front

What is the importance of aligning decimal points when adding or subtracting?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.

Tags

CCSS.5.NBT.B.7

Front

What is a common mistake when adding decimals?

Back

A common mistake is not aligning the decimal points, which can lead to incorrect sums.

Tags

CCSS.6.NS.B.3