Maths End of Year Exam: Things to remember

Number:

• Index laws: the base always stays the same.
• Finding percentages: add the correct amount!
• To decrease using a percentage: 100-(percentage decrease amount)=x
  • then x times number wanting to decrease
• To increase using a percentage: always have 1 before decimals to ensure it increases
  • e.g. x 1.234
• Standard form: 'A' numbers must be as big as they can BUT between 1 and 10.
  • e.g. A x 10x= 5.7 x 10 to the 8

Algebra:

• For equations like (x-4)/2 = (5x-1)/3, put it into brackets: 3(x-4)=2(5x-1)
• Be careful with letters and numbers: e.g. n+10 is NOT 10n
  • 10n is…