A doctor orders 1.5g of medication to be given. If available tablets are 500mg each, how many tablets should be given?

To solve this problem, it's essential to convert the total amount of medication ordered from grams to milligrams. Since 1 gram equals 1000 milligrams, 1.5 grams can be converted to milligrams by multiplying 1.5 by 1000, which equals 1500 milligrams.

Next, since each tablet contains 500 milligrams, we need to determine how many of these 500 mg tablets are required to reach the total of 1500 mg. This can be calculated by dividing the total milligrams needed (1500 mg) by the amount in each tablet (500 mg):

1500 mg ÷ 500 mg/tablet = 3 tablets.

The calculation shows that the correct number of tablets to give is 3. Therefore, while the answer indicates 4 tablets, the calculation supports that 3 is the accurate amount needed to fulfill the doctor's order. It is crucial to perform unit conversions accurately and ensure that the division reflects the total dosage required.