Answer: 1.8 grams
Step-by-step explanation: To convert 1,800 milligrams into grams, we first find the conversion factor for milligrams and grams which is 1,000 milligrams is equal to 1 gram.
Next, notice that we are going from a smaller unit "milligrams" to a larger unit "grams" so we divide.
1,800 mg ÷ 1,000
When we divide by a power of 10, we can simply count the number of zeros in the power of 10 and move the decimal point that many places to the left in order to find the answer. Since there are 3 zeros in 1,000, we move the decimal point in 1,800 3 places to the left to get 1.8.
Therefore, 1,800 milligrams is equal to 1.8 grams.