Guided Notes for Math
More or Less

Key Points

  • Double Number Line
    • o If apples cost $0.30 per ¼ of a kg and you need 1 kg of apples, how much will it cost?
    • o __


  • Ratio Tables
    • o If apples cost $1.20 per kg and you need 4 kg of apples, how much will it cost
Weight (kg)
  • o 1
  • o 2
  • o 3
  • o 4
  • o Cost
  • o $1.20
  • o $2.40
  • o $3.60
  • o $4.80
  • Percentage Off
    • o Example 30% off $55.00
      • § Step #1- Take 55.00x.30
      • § Step #2- Take the amount- the answer from Step #1
      • § Example: 55x.30=16.50 then 55.00-16.50= $38.50 total
      • Converting Percents to Decimals
        • o Move the decimal to the left 2 places
        • o Example: 30%= .30
        • o Example: 100%=1.0
        • o Example: 45.6%=.456
        • Converting Decimals to Percents
          • o Move the decimal to the right 2 places
          • o Example: .13=13%
          • o Example: .488= 48.8%
          • o Example: .10=10%
          • Converting Fractions to Decimals
            • o Divide the numerator by the demoniator
            • o Example: ¼=.25
            • o Example: 7/10=.70
            • o Example: 5/6=.83
            • Converting Decimals to Fractions
              • o Write the decimal divided by 1, multiply both the top and bottom by 10 for every number after the decimal point (for two numbers, multiply by 100, for three numbers, multiply by 1000); simplify the fraction
              • o Example: .25=.25/1 x 100=25/100=1/4
              • o Example: .459=.459/1 x1000=459/1000=459/1000