This is a follow up for

Roman Numerals equation 1

With your creativity and lateral thinking and any ways you can think of (except the restrictions below), make the following equation correct moving only one letter somewhere

enter image description here

No using not equal to or arrow signs

  • $\begingroup$ move one letter right? $\endgroup$ – Omega Krypton May 15 at 15:39
  • $\begingroup$ Yes indeed. Sorry about that. $\endgroup$ – DEEM May 15 at 15:41

Possible answer

Move the C (surrounding the minus sign on the right) over to the left, between the I and M as shown:
enter image description here
Then, we have 1cm = (XI-I)mm = 10mm, which is true!

  • 1
    $\begingroup$ The question asked for lateral thinking, not overlateral thinking... :P Very clever! $\endgroup$ – EKons May 15 at 20:10

Here's another answer.

! Move the I after the X to the right of the E. This gives you
enter image description here
or $1m = 10e2mm$. Put it another way, $1m = 10*10^2mm=1000mm$, which is correct.

  • $\begingroup$ That is very lateral thinking and clever $\endgroup$ – DEEM May 18 at 19:10

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