Question

3 cm 12 mm =________ cm​

Answer 1

Answer:

4.2 cm

Step-by-step explanation:

12 mm = 1.2 CM

(1 mm = 0.1 cm

so 1.2+3= 4.2

Answer 2

Answer:

3 cm 12 mm equal to 4.2 cm

Step-by-step explanation:

Given -

3 cm 12 mm

To find -

Convert 3 cm 12 mm into cm

solution -

A centimeter is ten times larger than a millimeter.

To convert mm into cm divide the length value by 10.

Where,

mm - millimeters

cm - centimeters

12 mm

$=  \frac{12}{10}$

$= 1.2 \: cm$

Add the same units value to get final conversation

3 cm 12 mm

$=3\:cm+1.2\:cm\\= 4.2 \:cm$

By converting we get,

3 cm 12 mm equal to 4.2 cm