ATI TEAS Math Practice Verified Solutions

ATI TEAS Math Practice Verified Solutions prime numbers a number which can only be divided by itself and 1 prime number examples 2, 3, 5, 7, 11, 13, 17, 19, 23, 29..... prime factorization Breaking down a composite number until all of the factors are prime composite numbers A whole number greater than 1 that has more than two factors. rational number A number that can be written as a fraction irrational numbers Numbers that cannot be expressed as a ratio of two integers. Their decimal expansions are nonending and nonrepeating. covert decimal to percent Convert percent to decimal move decimal two places to the left ex. 0.23=23% Move the decimal two places to the left ex. 700%=7.00 convert percentage to fraction 2. reduce the fraction EX: 35% = 35/100 = 7/20 convert fraction to decimal multiplying fractions 1. change the percentage to a fraction Divide numerator by denominator multiply the numerators and multiply the denominators reciprocal of a nonzero number fraction divide a fraction by a fraction a/b x b/a=1 ex. 3/4 x 4/3= 1 multiply the fraction by the other fractions reciprocal a/b / c/d= a/b x d/c ex. 3/4 / 5/6= 3/4 x 6/5= 18/20 least common multiple The smallest multiple (other than zero) that two or more numbers have in common. least common denominator The least common multiple of the denominators of two or more fractions. Multiply Decimals Multiply like normal, the decimals do have have to align, add the decimal places of both numbers together, the product's decimal places will be the sum of decimal places from both numbers Dividing Decimals by Decimals Move the decimal in the number outside the box over as many places as you need to to make it a whole number. Then do the same with the number inside the box. If the 2nd number still has a decimal, bring it up and divide normally Order of Operations (PEMDAS) Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction Roman numeral M 1000 Roman numeral C 100 Roman numeral L 50 Roman numeral XL 40 Roman numeral XC 90 Roman numeral CD 400 Roman numeral CM 900 Roman numeral D 500 of t imes what variable is equals % x 0.01 compatible numbers numbers that are easy to compute mentally estimation by clustering round all numbers to the nearest most common number, multiply the amount of items or number listed front-end estimation an estimation method in which the front digits are added or subtracted expression A mathematical phrase that contains operations, numbers, and/or variables. equations written mathematical statements in which two quantities are equal Hypotenuse the side of a right triangle opposite the right angle Pythagorean Theorem a²+b²=c² perimeter l+l+w+w circumference radius The distance around a circle A straight line from the center to the circumference of a circle or sphere. pi 3.14 Area of a square Area of a rectangle Area of a triangle Area of a circle A=s² A=lw A=1/2bh A=πr² Perimeter of a circle 2πr circumference of a circle Perimeter of a trapezoid Area of a trapezoid A=π(r)² P=a+b+c+d