What is PEMDAS? These rules define the order of procedures to perform to evaluate math expressions. Does 8+2×4 = 40 or 16? Find the orderly and most efficient ways to solve problems.
There are 20 books in the Pre-Algebra series. The first books continue from the Fraction series with more work on fractions and decimals. Books progress through percentages, proportions, metrics, scientific notation, order of operations and finally, probability in Book 20. Students who complete the Pre-Algebra series are now fully ready for Algebra (coming soon).