8cm plus 6mm equals how many mm?

Answer 1

In order to solve this you first need to convert the cm value into mm. This is to give a number that's easy to work with, and has consistent units with the rest of the question. There are 10mm in a cm. Thus to convert from cm to mm, you need to multiply by 10. In this case we have 8cm. This converts to mm as 8x10 = 80mm. So the question is 80mm + 6mm. This works out at 86mm.