FTCE General Knowledge Math Latest 2022

FTCE General Knowledge Math Latest 2022 operations addend+addend=sum sum-addend=difference factorXfactor=product dividend ÷ divisor = quotient division dividend ---------- = quotient divisor divide by zero any number ÷ 0 = can't do it 0 ÷ any number = 0 0 cannot be a divisor prime number whole number greater than 1 that is divisible only by itself and 1 composite whole number greater than 1 that are not prime prime factors use factor tree - e.g. 36 = 2∗2∗3∗3 GCF greatest common factor the greatest number that will divide evenly into the two numbers list factors of each then chose the highest one LCM least common multiple the smallest product that is a multiple of each of the counting numbers....factor each/ build a product consisting of each factor used the most number of times it appears as a factor. e.g...24=2∗2∗2∗3 36=2∗2∗3∗3 so LCM (24,36) = 2∗2∗2∗3∗3 =72 1 is neither prime or composite ... rational numbers whole numbers, integers, positive and negative fractions, decimals, and percents whole numbers counting numbers and 0 integers numbers that are either negative or positive and 0....o is not positive or negative rational numbers all numbers that can be written as positive or negative fractions ...rational numbers can be expressed as fractions, decimals, or percents 80%=.80=.8= 4/5 60%=.60=.6= 3/5 40%=.40=.4= 2/5 20%=.20=.2= 1/5 87 1/2% = .875= 7/8 62 1/2 %=.625= 5/8 37 12%=.375= 3/8 12 1/2% = .125= 1/8 66 2/3%=.66 2/3 = 2/3 5%=.05= 1/20 4%=.04= 1/25 1%=.01=1/100 1/100 irrational square roots irrational square roots do not have a number that they are evenly multiplied by...if given an irrational square root to estimate find the 2 numbers it falls between e.g. square root of 41 is between 6 and 7 rational square roots nonnegative number that multiplies by itself to get the number e.g...square root of 1=1, square root of 25 is 5 Is 1/0 a real number? NO...0 cannot be a divisor exponential notation eg...3⁴ = 3∗3∗3∗3=81 negative exponents eg. 2⁻³=½₃ = 1/8=.125 any number with 0 as an exponent is 1 e.g...3⁰=1 -3x ≥ 1 = x ≤ -1/3 (reverse the inequality because you divided both sides by a negative number) Pictograph pictures or symbols are used to represent numbers Measure of central tendency a numerical value that describes a data set by providing a "central" or "typical" value of the data set. Mean the arithmetic average of the numbers. Median