1/3 - 1/6 + 4/18 =
7/18
1/3
1/2
5/18
The Correct Answer is A
To solve the expression 
- 
+ 
, follow these steps:
Find a common denominator:
The denominators are 3, 6, and 18.
The least common denominator (LCD) of 3, 6, and 18 is 18.
Convert each fraction to have the common denominator of 18:
= 
= 
= 
= 
is already in the correct form.
Rewrite the expression with the common denominator:
– 
+ 
Combine the fractions:
– = 
+ 
= 
= 
Therefore, the correct answer is: 
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
To determine how long it takes to infuse 6 ml at an infusion rate of 1.5 ml per minute, follow these steps:
Calculate the infusion time using the rate and the volume to be infused:
Infusiontime = 
Plug in the values:
Infusiontime = 
Simplify the calculation:
Infusiontime = 4minutes
Therefore, the nurse should allow: 4 minutes for infusing 6 ml.
The correct answer is: 4 minutes
Correct Answer is A
Explanation
To determine if the nurse has enough medication, we need to calculate the total amount of medication used and compare it to the one-ounce vial.
- Morning Dose:
ounce - Afternoon Dose:
ounce
First, find a common denominator to add these fractions. The least common multiple of 8 and 7 is 56.
Convert each fraction to have a denominator of 56:
- For
:
= 
= 
- For
:
= 
= 
Add these fractions:
+ 
= 
So, the total amount of medication used is 
ounce.
The vial contains 1 ounce. The amount of medication remaining in the vial is:
1− 
= 
− 
= 
Since 
ounce is needed more to make up for the used amount, the nurse needs: 
of an ounce more.
Therefore, the correct answer is:
No, the nurse needs 
of an ounce more.
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