(Blak)
what is a nutral number
all positive intergers from one to infinity not including 0
what is an irratinal number
a number that cannot be expresed by a fraction
1. Every integer has an opposite except for 0. Why?
0 is not positive or negative. It's neutral. It is it's own opposite.
. How do you multiply fractions?
1. change whole or mixed numbers into fractions
2. Multiply horizontally across numerators then denominators
3. Simplify
1. How do you solve 5/9 = x/27?
(5)(27) = 9x
135/9 = 9x/9
15 = x (cross multiply)
what is an whole number
all positive intergers
a word that describes positive integers
Deposit, above zero, plus, earn, consume, increase, receive
. Rules for multiplying & dividing integers?
Multiply/divide by same sign = positive
Multiply/divide by different sign = negative
1. Decimal to percent?
multiply decimal by 100
1. How do you solve 1:4 = 8:x?
1/4 = 8/x
(4)(8) = 1x
32 = 1x
32 = x
what is an interger
a non-fraction or decimal number it can be positive negative or zero
. Words to describe negative integers
Withdraw, minus, loss, reduction, deduct, owe, debt
*whole numbers less than zero
1. Rules for adding & subtracting integers?
Both positive = sign becomes positive
Both negative = sign becomes positive
One positive one negative = sign becomes negative
1. Percent to decimal?
Divide percent by 100
2. Can you apply the laws of exponents to simplify 5^4 x 4^5?
No you can't because the bases are not the same. The laws of exponents don't work.
what is a rational number
a number that can be written a a fraction
1. On a number line, what side are positive integers on
right
How do you add/subtract fractions?
find common denominator, add or subtract, & solve to lowest terms
*whatever you do to the bottom, you do to the top
1. Fraction to decimal?
Divide numerator by denominator
Can you apply the laws of exponents to simplify 9^2/27^2?
9^2 = 3x3 = 9 (3^2)
27^2 = 3x3x3 = 27 (3^3)
(3^2)^2 / (3^3)^2
= 3^2x2 / 3^3x2
= 3^4 / 3^6
= 3^-2 = 1/3^2
*yes you can because 3 can multiply by itself to go into both 9 and 27
what is real number
an rational or irrational number
1. On a number line, what side are negative integers on?
left
. How do you divide fractions?
1. change whole numbers or mixed numbers into fractions
2. Switch and flip (KCF = Keep the 1st, change the sign, flip the 2nd)
3. Multiply as normal and simplify
1. Decimal to fraction?
Term
20 / 741. Decimal to fraction?
Definition
20 / 741. Find place value of decimal to determine denominator
2. Numbers to right of decimal point are numerator
3. Reduce
2. Without brackets?
numbers without brackets mean the negative symbol stays at the front