On one side of the balance scale, Henry placed a 6 gram weight. On the other side of the scale, he placed a ballet slipper.
How many milligrams does the slipper weigh? (1,000 milligrams = 1 gram)
A. 6,000 milligrams
B. 600 milligrams
C. 0.6 milligram
D. 60 milligrams
