Question

Convert: a)20.6 m = _______ km b)3000 mm = _______cm ( I WANT STEP BY STEP EXPLANATION )​

Answer 1

a)Here we have to covert 20.6 m into km

Now, to convert m into km we have to divide the number by 1000

When we divide the number by a multiple of 10, the decimal point shifts to the left side by the number of times the number of zeroes present in the number.

Here there are 3 zeroes in 1000, so the decimal point will shift to the left 3 times

 20.6 m = $\frac{20.6}{1000}$

∴20.6 m = 0.0206 km

b)Here we have to convert 3000mm to cm

Now, to convert mm to cm, we will have to divide the number by 10

∴3000 mm = $\frac{3000}{10}$

                   = 300 cm

Answer 2

According to the question,

(a) We have to convert $20.6m$ to km,

As, $1m=0.01km$

For converting m to km we have to divide it by $1000$

$=>20.6m=0.0206km$

(b) We have to convert $3000mm$ to cm,

As, $1mm=0.1cm$

For converting m to km we have to divide it by $10$

$=>3000mm=300cm$

Hence, (a) $20.6m=0.0206km$

(b) $3000 mm =300cm$