Problem 1
To convert from gallons to cups, we multiply by 16 since 1 gallon = 16 cups
Therefore, 4 gallons = 64 cups
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Problem 3
1 hour = 60 minutes
4 hours = 240 minutes (multiply both sides by 4)
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Problem 5
100 cm = 1 meter
1 cm = 0.01 meter (divide both sides by 100)
53 cm = 0.53 meter (multiply both sides by 53)
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Problem 6
1 foot = 12 inches
3 feet = 36 inches (multiply both sides by 3)
1 yard = 3 feet
1 yard = 36 inches
2 yards = 72 inches (multiply both sides by 2)