Question

Antoine wants to convert millimeters into kilometers. which operation should he choose? he should multiply millimeters by 1,000. he should divide millimeters by 1,000. he should multiply millimeters by 1,000,000. he should divide millimeters by 1,000,000.

Answer 1

If Antoine wants to convert millimeters into kilometers the operation should he choose is he should divide millimeters by 1,000,000 since 1 millimeter is equal to 0.000001 kilometers. Thank you for posting you math question here. I hope my answer helps. 

Answer 2

we know that

$1\ km =1,000,000\ mm$

so

$1\ mm =\frac{1}{ 1,000,000}\ km$

therefore

The answer is

to convert millimeters into kilometers

Antoine should divide millimeters by $1,000,000$