STAAR Review Key Concepts

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Math Operations

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56 Terms

1

1st coordinate (in an ordered pair)

x-coordinate

2

2nd coordinate (in an ordered pair)

y-coordinate

3

ordered pair

(x, y)

4

horizontal axis

x-axis

5

vertical axis

y-axis

6

origin (ordered pair)

(0, 0)

7

intersection of x and y axis

origin

8

how much more

subtract

9

horse to fly (measurement conversions)

multiply

10

fly to horse (measurement conversions)

divide of course

11

twice as much

multiply

12

three or four times as much

multiply

13

you know the total but don't know each or groups

divide

14

you know the groups & each but don't know the total

multiply

15

how much in all (same labels)

add

16

same number in each group (many times)

multiply

17

sum

add

18

quotient

divide

19

product

multiply

20

difference

subtract

21

each in the question

divide

22

each in the problem

multiply

23

how much longer

subtract

24

how much farther

subtract

25

how much change ($)

subtract

26

how much is left

subtract

27

volume formula

l x w x h

28

area of a rectangle

l x w

29

area of a square

s x s

30

perimeter

add all sides

31

add or subtract fractions w/ different denominators

find the LCD

32

multiply fractions

multiply straight across

33

divide fractions

Keep Change Flip

34

start with a fraction (dividing fractions)

end with a fraction

35

start with a whole # (dividing fractions)

end with a whole #

36

make a whole # a fraction

put it over 1

37

first four prime numbers

2...3...5...7

38

prime number

exactly two factors (1 and me)

39

divisible by 2

even # (ends w/ 0...2...4...6...8)

40

divisible by 5

ends with a 5 or a 0

41

divisible by 3

add digits and sum can be divided by 3

42

divisible by 4

double and half

43

divisible by 6

divisible by 2 and 3

44

divisible by 8

divisible by 2 and 4

45

composite number

3 or more factors

46

right triangle

has one right angle

47

acute triangle

all acute angles

48

obtuse triangle

one obtuse angle

49

equilateral triangle

all side equal

50

isosceles triangle

two sides equal

51

scalene triangle

no sides equal

52

add/subtract decimals

button your shirt (line up decimals)

53

divide decimal by whole number

raise it to the roof

54

¼

0.25

55

½

0.5

56

¾

0.75