There are 10mm in a centimetre. Multiply by 10 and you have your answer in millimetres. This gives you 21mm.
2.54 centemetres = 1 Imperial Inch.
1 inch = 2.54 centimetres (exactly).
One inch = 2.54 centimeters (rounded)
1 yard = 91.44 cm. And that is centimetres, not centemetres.
2.54 centemetres equals one inch. There are 10.63 inches in 270mm.
There are 10mm in 1cm, so 124 divided by 10 will give you your answer of 12.4cm
There are 10mm in a cm. Therefore to convert, you divide by 10. This gives you 70/10 or 7cm.
2.54 centemetres = 1 Imperial Inch.
There are 10 millimetres in one centimetre. Therefore, 21 centimetres is equal to 21 x 10 = 210 millimetres.
There are 10 millimetres in one centimetre. Therefore, 21 millimetres is equal to 21/10 = 2.1 centimetres.
There are 25.4 millimetres in one inch. Therefore 25.4 x 21 = 533.4 millimetres.
100.
50 of them
There are 10 millimetres in one centimetre. Therefore, 210 millimetres is equal to 210/10 = 21 centimetres.
There are 100 centimetres in a metre.
One kilometre is equal to 1000 x 1000 = 1000000 millimetres. Therefore, 21 kilometres is equal to 21 x 1000000 = 21000000 millimetres.
There are 1000000 millimetres in one metre. Therefore, 2.1 metres is equal to 2.1 x 1000000 = 2100000 millimetres.