18.200 is already rounded to 0.001
450.00...001 to the nearest 900.
.001 grams = 1 milligrams
245.000...001
2500.00......001 to the nearest 5000.
That is already rounded to the nearest hundredth. The hundredth spot is two numbers after the decimal. A good rule to go by is to mentally put a one under the decimal and then zeros under the following numbers: .1 would be in the tenth spot (1 under the decimal, 0 under the 1 = 10); .01 would be in the hundredth (100); .001 would be in the thousandth (1000), etc.
450.00...001 to the nearest 900.
24000.00...001 to the nearest 48000, although it is not very likely that anyone would want to round to the nearest 48000! But that is the least number.
.001 grams = 1 milligrams
1 gram = .001 kg so 100 grams = 100 x .001 kg = .1 kg
Grams*.001=kilograms
Yes. Grams use the same standard unit conventions as meters, bytes, liters, and anything else that uses the Greek naming conventions for unit sizes. So the next units smaller than milligrams would be: 1 microgram = 0.000 001 grams 1 nanogram = 0.000 000 001 grams 1 picogram = 0.000 000 000 001 grams 1 femtogram = 0.000 000 000 000 001 grams 1 attogram = 0.000 000 000 000 000 001 grams 1 zeptogram = 0.000 000 000 000 000 000 001 grams 1 yoctogram = 0.000 000 000 000 000 000 000 001 grams
.001
1 mg = .001 grams, so 2632.4 mg = 2.6324 grams.
1 kg = 1000 grams 1 gram = .001 kg
1 kg = 1000 grams 1 gram = .001 kg
1 mg = .001 grams, so .014 mg = 0.000014 grams
245.000...001