Math Praxis UPDATED Exam Questions and CORRECT Answers

Math Praxis UPDATED Exam Questions and CORRECT Answers "base 10" and base system ✔✔✔ -any number times 10,100,1000.... you multiply the first digit by that number then add those amo unt of zeros to the end of the number (ie. 375 x100=37500) -any number divided by 10,100,1000... you divide the first digit by that number then move the decimal to the left according to the amount of zeroes (ie. 375/1000= .375) --this is done with any cardinal numbers ✔✔✔ A cardinal number tells "how many." Cardinal numbers are also known as "counting numbers," because they show quantity. (8 puppies..14 friends) ordinal numbers ✔✔✔ Ordinal numbers tell the order of things in a set —first, second, third, etc. Ordinal numbers do not show quantity. They only show rank or position. (3rd fastest...6th in line) Rational number ✔✔✔ Any number that can be written as an integer divided by another integer (fraction) decimal to fraction and vice versa ✔✔✔ -for the amount of numbers in the decimal place that amount of zeros. (.475= 475/1000) -move the decimal to the left according to the amount of zeros (234/100= 2.34) turning a decimal into a percent ✔✔✔ move the decim al two places to the right (always use the first two numbers then the rest of the numbers are after the decimal. (ie. .2345= 23.45%) turning a fraction into a percent ✔✔✔ cross multiply so...... 375/1237 x ?/100 1237?/1237=37500/1237 ?=30.32% is the squa re of a number always greater than the number? ✔✔✔ no. (i.e.... 0[squared]= 0........... 1/4 [squared]= 1/8) expanded notation ✔✔✔ The way to write a number that shows the place value of each digit. Example: The expanded form of 456,759 is 400,000 + 50,000 + 6,000 + 700 + 50 + 9 scientific notation ✔✔✔ using powers of 10 (i.e 10 ^4) to express large numbers (i.e 43,700 is written in scientific notation as 4.37x10 ^4... or 43.7 x10 ^3) how to reverse scientific notation ✔✔✔ 43.7 x 10^3 = 43700 prime numbers ✔✔✔ a number that has only 2 factors, one and itself composite numbers ✔✔✔ A positive integer that has factors other than just 1 and the number itself factor ✔✔✔ any whole numbers that when multiplied together form a product. Example: factors of 12 are 1, 2,3,4,6,12 multiples ✔✔✔ the result of multiplying any whole number by the counting numbers Example: multiples of 7 are 7,14,21,28... are 1 and 2 prime numbers? ✔✔✔ 1--no 2--yes is zero and even or odd number ✔✔✔ even bc it is in between odd numbers