4 kg - 400 g = ____
3600 g
Both the quantities 4 kg and 400 g have different units.
So let's convert 4 kg to grams.
We know that 1 kg = 1000 g
(To convert a larger unit (kg) to a smaller unit (g) we multiply by the conversion factor.)
Therefore, 4 kg = 4 × 1000 g
Now, 4000 g - 400 g = 3600 g