Name_______________________
Metric System Practice problems
SHOW YOUR CALCULATIONS!!!!
1 & 2. 250km = 250000 m = 25000000 cm
3 & 4. 780000l = 780ml = 0.78L
5. 2.5 x 103 m = 2.5 x 1036 mm
6. 50 m = 0.05mm
7. 45oC = _113_oF
8. 213 oF = _101_oC
Formula reference: °C= 0.56 (°F-32°)
°F=(1.8x°C)+32°
9. How many 10ml injections can be prepared from 2L of medicine?
convert and divide
10. The average length of a ball point pen is about _______ long. (use metric units)
go ahead and measure yourself
11. A person who is 6 feet tall is about ______ long (use metric units)
1ft = 30.5cm
12. 1oz = 30ml. How many ml are found in a 64oz bottle of water?
1920ml
13. 2 aspirin tablets = 1g. How many tablets does a 1000g bottle of aspirin contain?
2000
14. A nickel has a mass of 5g. How much does $5.00 of nickels weigh?
500
15. What is the correct scientific notation for the following number: 0.0000678
6.78 X 10-5
16. Set up a ratio to solve for x. 9:72 as x:64
X=8
SHOW YOUR WORK- I WANT TO SEE HOW YOU GO ABOUT YOUR CALCULATIONS!!!!
Use the diagram above to answer 17 – 19 questions.
17. In the electrocardiogram above you see cycles that measure 20mm. How many complete
cycles are shown above?
count from peak to peak
18. If the paper speed is 15mm/s, how many seconds does it take to complete one cycle?
the speed is 15mm/s you measured on beat in 20mm. That means that one beat took more
than 1 sec. to figure out how long it took, set up a ratio and solve for the number of sec
15 mm = 20mm
1 sec
x sec
solve for X and you get 1.33sec
19. The cycles shown above represent a heart beat. Using the information from the answer above,
determine how many beats per minute
if one beat takes 1.33 sec then how many beats are there in 60 sec (beats/minute)? that
means how many times can 60 be divided by 1.33- 45 times. thus there are 45 beats per minute.
20. If 1kg=2.2lbs, how many pounds are you lifting if you pick up a patient who weighs
45.0kg?
99 lbs
21. The prescription reads 60mg/kg three times a day and the patient weighs 180lbs. How much
medication will you administer to the patient in one day? (2.2 lbs =1kg)
14,727 mg/day (WOW- do you think the patient will be a little over medicated?)
22. Assume that for every 1 l (microliter) of blood there are 8.5 x 108 cells. How
many white bloods cell will you collect if you draw 0.5 L of blood?
4.25 x 1014