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Q: How many millimeters in 3cm?

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30 mm

30 of them

30mm is 3cm

30mm=3cm

30 because there are 10 millimetres in a centimetre.

3 centimeters is approximately equal to 30 millimeters.

It is: 30mm = 3cm

10mm=1cm 20mm=2cm 30mm=3cm get it ? the list goes on .

30 there are 10mm in 1cm so in 3cm 10 x 3 = 30

There are 10 millimetres in a centimetre. Due to this you multiply by 10 here. 9.22x10^3cm is 9220cm. This is 9220*10 i.e. 92200 millimetres, or 9.22x10^4 millimetres.

1mm=0.1cm, therefore 30mm=3cm. 3cm is less than 5cm so 5cm is indeed greater than 30mm.

In order to subtract, we need all units to be equal. We can either convert centimeters to millimeters or millimeters to centimeters.4 centimeters = 40 millimeters40 millimeters - 10 millimeters = 30 millimeters. (3cm)10 millimeters = 1 centimeter4 centimeters - 1 centimeter = 3 centimeters (30 mm)

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