Algebra Unit 1 Review

Vocabulary

100

this term represents a number sentence with digits, operations, AND an equal sign

equation

200

this term represents a number that is unknown or whose value may change

variable

300

this term represents a number sentence with digits and operations (no equal)

expression

400

this phrase means a set of math computations that UNDOES the other one

inverse operations

500

this word means a number whose only factors are 1 and itself

prime

Writing Equations

100

a number minus four

N-4

200

two of a number totals fourteen

2N=14 or N+N=14

300

four of a number plus six is equivalent to nine

4N+6=9

400

the quotient of a number and ten

N / 10 

500

six less than twelve of a number, resulting in ninety eight

12N-6=98

Solving Equations

100

N-12=98

N=110

200

12N+4=52

N=4

300

(N-31)/4 = 2

N=39

400

3N/4=18

N=24

500

2N+.5=24.5

N=12

Solving Equations

100

8 = 3N - 4

N=4

200

6N-5=7

N=2

300

(N/5)+9=11

N=10

400

0= N/5 - 4

N=20

500

6 = N/4 + 2

N=16

Random

100

What would UNDO multiplying something by 12?

dividing it by 12

200

Explain the difference between an equation and an expression

an equation has an equal sign, while an expression does NOT

300

9 = 9 + 9N

N=0

400

3N/4=18

N=24

500

this word means a number who has many other factors besides one and itself

composite