Science Questions and Answers
1.Order of Operations:
PEMDAS Parentheses
Exponents
Multiplicatio
n Division
Addition
Subtraction
(between roots and exponents, do whatever comes first in the problem)
2.What is the easiest way to find a common denominator?: multiply all
the denominators
3.How do you multiply fractions?: multiply numerator x
numerator mutiply denominator x denominator
(don't need a common denominator)
4.how do you divide fractions?: flip the second fraction and then multiply
5.Z^-2: 1
---
zxz
1/
13
, 6.perfect square number: Taking a positive integer and multiplying it
by itself equals a perfect square.
Example: 3 x 3 = 9
9 is a perfect square.
7.what is the distributive property?: A (B+C) = AB + AC
8.what is the opposite of distributing?: factoring
9.what does the commutative property of addition and multiplication
tell us?: order does not matter
a+b=b+
aaxb=b
xa
10.what does the associative property of addition and multiplication
tell us?: grouping does not matter
A + (B + C) = (A + B) + C
11.identity property of addition: any number + 0 equals itself
12.identity property of multiplication: any number x 1 equals itself
13.cerebral cortex: part of the nervous system; 4 lobes, spatial
2/
13