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The two conversions you need will be -

1 dm (decimeter) = 10 cm (centimeter)

1 cm (centimeter) = 10 mm (millimeter)

First, we will convert 2.99 dm to cm.

2.99 dm x 10 cm/dm = 29.9 cm

Now, we will convert 29.9 cm to mm.

29.9 cm x 10 mm/cm = 299 mm

So, 2.99 dm = 299 mm

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โˆ™ 2010-03-02 21:36:33
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Q: 2.99 decimeters equals how many mm?
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