Question

change the following 61cm 9mm in to mm

Answer 1

1 cm = 10mm.
So, 61cm 9mm =
(61 ×10+9)mm
= 610 +9mm
=619mm

Answer 2

To convert cm to mm, multiply it by 10

61cm = 61×10 = 610mm

Now, add both the numbers..

610mm+19mm = 619mm

#Hassan