Pre-Algebra Summary Calculator

May 2024 · 1 minute read
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Fractions


Follow the PEDMAS Rule: Parentheses, Exponents, Division, Multiplication, Addition, Subtractionxn = x multipled by itself n times
53 = 5 x 5 x 5 = 125Check to see if a number is a square, i.e., √81 = 92 = 9 x 9
For numbers that do not have a square, i.e., √40, we find the highest square in it's factors.40 = 20 x 2, 10 x 4, 8 x 5, and we know that √4 = 2, so we have 2√10Prime Factorization: Factor a number into a product of primes, i.e., 40 = 2 x 2 x 2 x 5
Prime Power Decomposition: Combine common prime numbers from the Prime factorization, i.e., 40 = 23 x 5

Proportions:


You can cross multiply to get a x d = b x c

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