rates

• rate = change/time
• make sure the units are the same before you add, divide, subtract or times
• a rate is a measurment that compares 2 quantities
• you must include the quantities within the equation of your answer
• beats per min = beats / min = beats over min
• km/h = km / h = km
• 3600 seconds in an hour
• % is just amount/100
• how many times bigger is x than y

  • -powers
  • X-Y = amountA
  • 10^amountA
  • =amountB is *answer* times bigger
• km to m = x1000
• m to cm = x100
• cm to mm= x10
• mm to cm = /10
• cm to m= /100
• m to km= /1000
• volume = l x w x h
• area = l x w
• speed = distance / time
• distance = speed x time
• time = distance / time
• cents PER Letre (c/l)
• 24 hours in a day
• 8760 hours in a year