math formula

Question 1

length of a diagonal inside a 3d figure

Answer 1

L2 x W2 x H2 = D2

Question 2

add fractions

Answer 2

need same denominator

Question 3

multiplying fractions

Answer 3

reduce first, multiply across

Question 4

dividing fractions

Answer 4

find reciprocal of 2nd fraction, then multiply

Question 5

comparing fractions

Answer 5

use bowtie method

Question 6

convert mixed number to a fraction

Answer 6

multiply whole number by denominator then add to the numerator= new numerator over same denominator

Question 7

percent increase

Answer 7

(difference over original) x100

Question 8

Exponent rule acronym

Answer 8

MADSPM

Question 9

Multiplying exponents

Answer 9

add them

Question 10

Dividing exponents

Answer 10

Subtract them

Question 11

Exponents with a power

Answer 11

multiply them

Question 12

Negative exponents

Answer 12

put a 1 over the whole number, its then positive

Question 13

When can square roots be added/subtracted

Answer 13

when the number inside the square is the same

Question 14

When can square roots be multiplied

Answer 14

anytime

Question 15

when can square roots be divided

Answer 15

anytime, sqrt(a/b) = sqrt(a) / sqrt(b)

Question 16

Simplifying square roots

Answer 16

find ways to factor where one of the #’s is a perfect square, sqrt(20)= sqrt(4x5)= 2sqrt(5)

Question 17

Prime numbers

Answer 17

(((not 0 and 1))))

2,3,5,7,11,13,17

Question 18

Integers

Answer 18

all numbers -1,0,1 (cannot be fractions)

Question 19

when can x2 (x squared) be positive

Answer 19

when x is positive OR negative

Question 20

AVG pie

Answer 20

/ total/
# x avg

Question 21

Rate pie

Answer 21

/Distance or amount/

time x rate

Question 22

What do you need to solve a standard deviation problem

Answer 22

the mean

Question 23

what do you need to find for ratio problems

Answer 23

the total

Question 24

std deviation bell curve %’s

Answer 24

34%, 14%, 2%