c. Solve for X:
5X = 15
5
5
X=3
d. Refer back to step a. to find the units of X. The units for X in this problem is
tablets; therefore, the answer is 3 tablets.
NOTE:
The most common mistake is the failure to label units. Labeling units will
ensure that corresponding units of the proportion are the same.
2-7.
ROUNDING OFF
a. When rounding answers to the nearest tenth, you must take your calculation
out to the hundredth place and then round to the tenth place.
EXAMPLE: 3.91 = 3.9
b. When rounding answers to the hundredth place, you must take your
calculation out to the thousandth place and then round to the hundredth place.
EXAMPLE: 3.846 = 3.85
c. DO NOT ROUND UNTIL THE LAST STEP OF YOUR CALCULATION!!!!
2-8.
Round answers to the nearest tenth.
On Hand
Doctor's Order
Answer
a. Mellaril 100 mg/tab
50 mg.
_________
b. Gantrisin 0.5 Gm/cc
2 Gm
_________
c. Demerol 50 mg/cc
25 mg
_________
d. Dilantin 100 mg/cc
250 mg
_________
e. Valium 2.5 mg/tab
15 mg
_________
f. Ampicillin 0.5 Gm/tsp
1 Gm
_________
g. Lincocin 500 mg/0.5 cc
250 mg
_________
MD0904
2-5