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1 centimetres equates to 10 millimetres.

Therefore 5 millimetres is half or 0.5 centimetres

Adding 2 centimetres and 5 millimetres, you get 2.5 centimetres.

But in another way round;

2 centimetres equates to 20 millimetres.

Adding 2 centimetres and 5 millimetres, you get 25 millimetres.

  • It all depends you are using CM or MM.
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15y ago

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