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Align the decimal points and add them up; any gap at the end of a line can be filled with zeros if this makes the addition easier:

eg: 0.1 + 0.02 + 0.0003

0.1

0.02

0.0003 +

---------

0.1203

or

0.1000

0.0200

0.0003 +

---------

0.1203

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8y ago
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Q: How do you write decimals that are in expanded form into standard form?
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