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MATH 231 Test # 2 Review Sheet

Be able to:
▪ Use specified mental calculation and estimation techniques with addition , subtraction , multiplication, and division problems . Demonstrate and explain your procedure.

▪ Explain the difference between computational estimation and mental computation.

▪ Use the expanded and/or standard algorithm to demonstrate addition, subtraction, and/ or multiplication .

▪ Use base-ten blocks and the sharing inter pretation to model (diagrams and explanations) addition, subtraction, multiplication, and /or division.

▪ Find all the factors of a number .

▪ Use/explain the divisibility rules to de termine if one number is divisible by another.

▪ Determine/explain whether a number is abundant, deficient, or perfect .

▪ Determine/explain whether two numbers are amicable numbers.

▪ Define and give examples of:

o Prime numbers
o Composite numbers
o Relatively prime numbers

▪ Identify numbers as prime or composite.

▪ Give the prime factorization using factor trees and stacked division.

▪ Find the GCF using the Euclidean algorithm. Be able to explain procedure.

▪ Find the LCM and GCF using the prime factorization. Be able to explain procedure.

Solve application problems involving the LCM and/or GCF. Be able to explain why the LCM or GCF is used and be able to explain your procedure.

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