Cracking the SAT subject test in math 2, 2nd edition

Cracking the SAT Subject Test in Math 2, 2nd Edition (E) Summary ○Many SAT Subject Test in Math 2 questions require you to be comfortable with the definitions of various terms If you don’t know a term[.]

Summary

○ Many SAT Subject Test in Math 2 questions require you to be

comfortable with the definitions of various terms If you don’t know

a term, make a flashcard and memorize it!

○ Make sure you know PEMDAS and apply it to EVERY question with multiple operations! Functions questions in particular can be tricky with respect to order of operations!

○ There are two formulas for percent change:

• The basic formula for percent change is:

• The formula for repeated percent change is: Final = Original × (1

± Rate)# of changes If it’s a repeated percent increase, you add Rate

If it’s a decrease, you subtract Rate

○ If you have a question that asks for the average, mean, or arithmetic mean, use the Average Pie:

○ Irrational numbers are numbers which CANNOT be simplified into

a fraction using only integers If you have a TI-80 series calculator, you can use MATH->FRAC whenever you want to know the fraction equivalent of a decimal

○ Remember the rules for exponents: MADSPM Roots are the inverse operation of exponents; you can express roots either with the radical sign or with fractional exponents You can use fractional exponents

to combine terms with different roots

○ Special exponents:

• Any number, except 0, raised to the 0 power is 1

• Raising a number to the first power does not change the number

• A negative exponent means take the reciprocal of the number (divide 1 by the number), and then apply the exponent

• Fractional exponents are a way of writing exponents and roots together: The top of the fraction is the exponent and the bottom of the fraction is the root