Unit #4: 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 the decimal representation of the fraction 1/2.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would whole numbers, carrying over if necessary.

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, borrowing if necessary.

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Back

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Front

If Lukas has $10 and spends $3, how much does he have left?

Back

He has $7 left.

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Back

Front

What does D represent in the equation D = W?

Back

D represents deposits in a piggy bank.