Question

how will you write 4 cm and 2 mm in 'cm' using decimals?​

Answer 1

Given,

The main measurement is 4 centimetres and 2 milimetres.

To find,

The single decimal form of the measurement in centimetre unit.

Solution,

For the conversion of the whole measurement in the centimetre unit, we need to convert the milimetres part of the measurement into the centimetres unit.

So,

10 mm = 1 cm

1 mm = 1/10 cm

2 mm = 2/10 = 0.2 cm

Now, the value of final measurement in the decimal form of centimetre unit, will be

= 4 cm + 0.2 cm

= 4.2 cm

Hence, the decimal form of the measurement is 4.2 centimetres.

Answer 2

Given:

How will you write 4cm and 2 mm in 'cm' using decimals

Solution:

we know that 1 centimeter equals to 10 millimeters. So, now we have to find 2 millimeters equals how many centimeters?

Millimeters is mm

Centimeters is I'm

Convert millimeters to centimeters:

10 mm = 1 cm

2 mm = 2/10 = 0.2 cm

Now, write 4cm and 0.2 cm as a decimal form:

4 cm and 2 mm = 4.02 cm.

Hence, the final answer is 4.02 cm