2.1.2.3 like terms can be added like
normal numbers
2.1.2.3.1 eg. 2y+6y=8y
2.2 indices
2.3 simplify-to make a sum shorter or simpler.
to take away as many signs (+-ect.) as
possible
2.4 evaluate-to look over a sum and
answer it
2.5 expand-the opposite of
simplify, to make the sum
longer, to insert all needed
signs
2.6 coefficient
2.7 powers-2 to the power of 4. (2 with a little 4 in the
right hand corner), you have to multiply that
number by itself that many times. eg 2 to the power
of 4=2x2x2x2=16
2.8 abbreviation-to make a sum shorter
2.9 consecutive-numbers that come in order eg. 1,2,3
2.10 variable
2.11 substitution
2.12 quotient
2.13 expression-the sum
3 adition, subtraction, multiplication, division
3.1 you can add, subract, multiply
and divide like terms as normal