MATHS STATISTICS UNIT 1 - HIGHER.

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  • MATHS UNIT 1
    • When multiplying without calc - always use GRID METHOD.
    • Multiplying decimals without calc - 1st take decimal away, times whole numbers then put decimal back by number of places.
    • Dividing without calc always use - BUSTOP METHOD.
    • Negative numbers rules - *Two signs same = '+' sign *Two signs diff = '-' sign
    • BODMAS
      • Fractions + Square roots = INVISIBLE BRACKETS ()
    • FACTORS - Factors of a number are all the numbers it divides by.
    • HCF - All the biggest number that given numbers divide by.
    • Rounding decimal points - 1)Fine position of last digit 2) look at next digit to -> (Decider) 3) Decider 5+ round up, 4- leave as it is
      • ROUNDING significant figures - 1) find position of last digit 2)look digit -> decider, 5+round up 4-keep same
        • 1st significant figure - 1st digit that is not 0

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