Math test 1

Question 1

What is prime facorization?

Answer 1

when you divide a number until you get its prime facors

Question 2

How do you multiply fractions

Answer 2

Just multiply across

Question 3

How to divide fractions?

Answer 3

Reciprocal

Question 4

How to add/subract fractions?

Answer 4

Make denominaters the same

Question 5

LCM?

Answer 5

Least common multiple.
DO prime factorization, select similar factors, multiply if needed. If not then that is the LCM

Question 6

HCF?

Answer 6

Highest common factor. DO prime facorization. Select all facors from both numbers - if there are repeats choose the bigger one.

Question 7

Multilplying decimals?

Answer 7

When multiplying decimals, line up decimal points and bring decimal down into answer how many decimal points there are in two original numbers

Question 8

Dividing decimals?

Answer 8

Move decimal place until you have two whole numbers. then divide in the normal way (box thingy)

Question 9

Proportions?

Answer 9

Use x bc mr degrazia wants to.
Ex. 2:4 = x:8
4 * 2 = 8
2 * 2= 4
x=4

Question 10

Share __ into the ratio

Answer 10

Set up an algebraic equation
7x + 8x = 30
then combine the two
15x = 30
solve
x=2
Then to 7x2 + 8x2 which equals 14 + 16

Question 11

a^m x a^n =

Answer 11

a ^(m+n)

Question 12

a^m / a^n =

Answer 12

a^(m-n)

Question 13

(a^m)^n=

Answer 13

a^mn

Question 14

(ab)^m=

Answer 14

a^m x b^n

Question 15

(a/b)^m=

Answer 15

a^m/b^m

Question 16

a^0 =

Answer 16

1

Question 17

a^-m=

Answer 17

1/a^m

Question 18

(a/b)^-m

Answer 18

reciprocal with positive exponent
(b/a)^m

Question 19

Scientific notation is…

Answer 19

a x 10^n

move the decimal point until you have a number less then ten. Then count the decimal spaces. Thats the number that u put as the exponent

Question 20

Multiplication with scientific notation

Answer 20

(a x 10^n) x (b x 10^m) =
(ab) (10^m + n)

Question 21

division with scientific notation

Answer 21

(a x 10^n) / (b x 10^m) =
(a/b) (10^m - n)