Question

Find the value of 67cm-28mm

Answer 1

642mm or 64.2 cm

Explanation:

67 cm = 670mm

So, that's 670-28mm = 642mm

Answer 2

642 mm or 64.2 cm

Explanation:

67cm-28mm

We need the same units

67 cm * 10 = 670 mm

670 mm - 28 mm

642 mm

We can convert back to cm by dividing by 10

64.2 cm