Question

A large adult kangaroo can have a mass of 90,000 grams. How many kilograms is it. (1g =1,000g)

Answer 1

$90,000/1,000=90$
Your answer is 90 kilograms.

Answer 2

$1kg=1,000g!!!\\\\therefore\ 1g=\frac{1}{1,000}kg=0.001kg\\--------------------\\90,000g=90,000\cdot0.001kg=\boxed{90kg}\\\\Answer:\boxed{\boxed{90,000g=90kg}}$