oct 4th: test #1

Question 1

what is multiplication?

Answer 1

fast adding.

Question 2

how to multiply decimals?

Answer 2

deal with decimals, count the number of digits after the decimal and then move decimal in answer same number of times.

Question 3

divisibility rule for 2?

Answer 3

if the last digit is even.

Question 4

divisibility rule for 3?

Answer 4

if the sum of the # is divisible by 3.

Question 5

divisibility rule for 4?

Answer 5

if the last two # are divisible by 4.

Question 6

divisibility rule for 5?

Answer 6

if the last # are divisible by 5.

Question 7

divisibility rule for 6?

Answer 7

if the # meets the rule for 2 + 3 eg. 74, 484, 2688.

Question 8

divisibility rule for 9?

Answer 8

if the sum of the # are divisible by 9.

Question 9

divisibility rule for 8?

Answer 9

if the last 3 # are divisible by 8.

Question 10

divisibility rule for 10?

Answer 10

if the # ends in 0.

Question 11

divisibility rule for 11?

Answer 11

if the sum of every other digit = the sum of the remaining number
eg. 3856

Question 12

divisibility rule for 12?

Answer 12

if the # follows the rules for 3 + 4. eg. 216

Question 13

divisibility rule for 25?

Answer 13

if the last two digits are either 00, 25, 50, or, 75.

Question 14

prime number:

Answer 14

only has 1 set of factors, can only be divided by 1 and itself.

Question 15

composite number:

Answer 15

has more than 1 set of factors, can be divided by at least three numbers

Question 16

example of prime numbers:

Answer 16

2, 3, 5, 7, 11, 13, 17, 19, 23, and 29.

Question 17

what makes up a power?

Answer 17

a base and an exponent.

Question 18

what is a power?

Answer 18

a numerical expression that shows repeated multiplication.

Question 19

what does the base do (power)?

Answer 19

the number being multiplied.

Question 20

what does the exponent do (power)?

Answer 20

the amount of times to multiply the base.

Question 21

how to multiply powers?

Answer 21

if the base is the same then add the exponents
eg = 4 to the power of 3 + 4 to the 5 = 4 to the power of 8.

Question 22

how to multiply powers when the base and exponents aren’t the same?

Answer 22

if the bases are different you must solve/calculate differently.

Question 23

how to divide powers?

Answer 23

if the bases are the same then subtract exponents.
eg. 7 to the power of 7 divided by 7 to the power of 4 = 7 to the power of 3.

Question 24

how to divide powers with brackets?

Answer 24

when dealing with brackets, you multiply the 2 exponents together.

Question 25

how to multiply powers when bases are different but exponents are the same?

Answer 25

multiply bases and leave the exponents.

Question 26

what is expanded form?

Answer 26

showing a number while separating each ones, tens, hundreds, thousands... 342 = expanded form - 300 + 40 + 2.

Question 27

what is scientific notation?

Answer 27

easy to express either really large or really small numbers. 342 = scientific notation - 3.42 x 10 to the power of 2.

Question 28

what are the 3 steps of scientific notation?

Answer 28

1. decimal always goes between first and second digit. 2. mental multiply by base 10 to move decimal. This number becomes exponent over ten. 3. Rewrite using base 10 with exponent.

Question 29

for scientific notation: if we move the decimal ____ than we have a positive exponent

Answer 29

left.

Question 30

for scientific notation: if we move the decimal RIGHT than we have a ____ exponent.

Answer 30

negative.

Question 31

what is multiplying by power of 10?

Answer 31

when multiplying by power of ten, the decimal moves 1 spot for every power (exponent)

Question 32

how to multiply by base 10 with a decimal?

Answer 32

the decimal moves 1 spot to the left for every power of 10. eg. 327 x 0.01 = 3.27

Question 33

what is dividing by power of 10?

Answer 33

when we divide by a whole number the answer becomes smaller which means the decimal is moving left 1 spot for every power of ten. which also happens to each exponent.

Question 34

what is dividing by power of ten with a decimal?

Answer 34

when we divided by a decimal power of ten the answer becomes larger when we move the decimal to the right.

Question 35

if you are expressing dividing by powers of 10 with a house...

Answer 35

NO DECIMAL IN HOUSE!!!

Question 36

i hate

Answer 36

lazy people

Question 37

NEVER BACK DOWN NEVER WHAT??

Answer 37

NEVER GIVE UP