Adding and Subtracting Decimals

Line up the decimal points vertically

Write the numbers horizontally

Add zeros to the left of the numbers

Subtract the smaller number from the larger one

To make the numbers look bigger

To ensure each number has the same number of digits after the decimal

To confuse the reader

To make subtraction easier

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13

It increases the sum by 1

It decreases the sum by 1

It has no effect

It doubles the sum

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Both require multiplying the numbers

Both require lining up the decimal points

Both require dividing the numbers

Both require ignoring the decimal points

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3

To decrease the value of the number

To increase the value of the number

To make the subtraction process easier

To ensure the numbers are aligned

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3

2

5

Keep your work organized and aligned

Add random numbers to the result

Ignore the decimal points

Always use a calculator