1-3 Flashcards
What is the sum of any number and its opposite?
Zero
What is absolute value?
The distance or number of units from zero
What is the result of addition?
Sum
What is the result of subtraction?
Difference
What is the result of multiplication?
Product
What is the result of division?
Quotient
What is the top number of a fraction called?
Numerator
And tells the portion of the bottom number being discussed
What is the bottom number of a fraction called?
Denominator
And tells how many parts there are to the whole number
How do you simplify a fraction?
Divide both the numerator and the denominator by the same non zero whole number until 1 is the only whole number that will divide into both terms of the fraction evenly
What do you have to have in order to add or subtract fractions?
The denominator has to be the same.
Either multiply or divide both the numerator and denominator by the same whole number to get the same denominator
Always simplify at the end
How do you multiply fractions?
Multiply both numerators and then both denominators
Then simplify
How do you divide fractions?
Multiply by its reciprocal
Cross multiply
Then simplify
What do you have to do with mixed numbers before adding subtraction multiplication or division?
Convert mixed numbers to improper fractions
When do you place the decimal point for multiplication?
After multiplying count the decimal places from both numbers and place it that many spots in the answer
When do you place the decimal point when dividing?
Before dividing. Move the decimal point in the divisor to make it a whole number then move the decimal point the same number of spots in the dividend and place the decimal for the quotient above the decimal point of the dividend
How do you add or subtract decimals?
Line up the decimal points then add or subtract
How do you convert decimals to fractions?
Digits to the right of the decimal point are the numerator and the place value as the denominator
.127 = 127/1000
.2 = 2/10
How do you convert a decimal to a percent?
Move the decimal two places to the right and add % sign
How do you convert a percent to a fraction?
Convert percent to decimal and decimal to fraction
How do you convert a percent to a decimal?
Move the decimal two places to the left and drop the %
What is the simplest form of any matter called?
Element
What are the parts of an atom?
Electron
Proton
Neutron
What makes up the nucleus of an atom?
Protons and neutrons
What are the smaller sub-particles of the proton and neutron called?
Quarks
How many times greater is the mass of a proton than the mass of an electron?
1,836 times greater
What are valence electrons?
The electrons in the outer most orbit or shell of atoms
How many valence electrons does a conductor generally have?
One or two
How is the atomic number of an element derived from?
The number of protons in the nucleus
What is the primary source of electrical power?
The flow of electrons