Factor Label Method of Problem Solving

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Factor LabelMethod of Problem Solving
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Make sure that you

• Always label!!!
• Begin with the unit you want to find
• Cancel out the labels

The label that you want to find will be the only
one that does not cancel out
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Examples

• How many seconds are there in August?

Conversion Factors 60 sec 1min 60 min
1hour 24 hours 1day 31 days August
24 hours
60 min
60 sec
31 days
?sec
2,678,400 sec
1 day
1 hour
1 min
1
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Interesting Facts for Sample Problems
Longest Female Beard Vivian Wheeler of Wood
River, Illinois, USA The longest strand was
measured at 27.9 cm in 2000 How many km is
this?
27.9 cm
1km 1000 m
1 m 100 cm
2.79 X 10-4 km
? km
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Heaviest Man

• The heaviest person in medical history was Jon
  Brower Minnoch (USA, 194183). He was 61 tall
  and weighed 442 kg in September 1976.
• How many pounds did he weigh?
• (HINT use pg 18-19 in the back of your planner
  for conversion factors)

442 kg
2.2 lbs
? lb
972.4 lbs
1
1 kg
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• Largest SpiderThe world's largest known spider
  is a male goliath bird-eating spider It had a
  record leg-span of 28 cm.
• How many mm is this?

10 mm
28 cm
? mm
280 mm
1
1 cm
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• Competitive Eating
• Takeru Kobayashi swept over his competition at
  the Nathan's Famous hot dog eating competition,
  gulping down 53.5 hot dogs in 12 minutes,
• How many kg of hot dog did Takeru eat in 12 min?
  (HINT 1 hotdog weights about 0.11 lb)

1 kg 2.2 lb
53.5 hotdogs
0.11 lb 1 hotdogs
? kg
2.7 kg
The 5-foot-7, 132-pound Kobayashi, of Nagano,
Japan,. He ate an average of one every 13
seconds "I think he has proven, once again, that
he is one of the finest athletes of any sport in
the world," said Richard Shea, a spokesman for
the contest.
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