Study Notes→Numbers:
Multiples: Values of a certain number.
Factors: Variety of numbers that make up a value.
Primes: A number that can only be divided by itself.
HCF: The highest number that both value have factors of.
2) Order of Operations:
Brackets
Exponents
Division
Multiplication
Addition
Subtraction
Left to right
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3) Rounding:
5 or more we add to its nearest 10,100, 1000 etc.
4 or less leave it the same.
E.g. 654 1dp= 650
7.39= 7.40
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4) Standard Form:
Numbers that are from 1-9 and it depends on the times you move it.
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5) Conversion Fraction=Decimal=Percentages
Fraction= Decimal= Dived the fraction/ E.g. ½= 0.5
Fraction & Decimal= x 100= Percentage
Percentage / 100= Decimal & Fraction
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6) Percentage:
E.g. Percentage of means times= x
10% of 600= is the same as= 10 x 600
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7) Percentages Increase/dec:
Original form= (1+ r/100)= Find
Find= Divideby( 1+ r/100)
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8) Ratio
Step 1: Convert the ratio to Fraction
Step2: Then find the fraction of the value
E.g Share 60 into 2:3?
2:3= ⅔
⅔ of 60= 40
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