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Factors and Multiples
Divisibility Rules for 2, 5, and 10
Divisibility Rules for 3 and 9
Prime Numbers. Composite Numbers
Greatest Common Divisor (GCD)
Lowest Common Multiple (LCM)
Divisibility of Natural Numbers
Fundamental Property of Fractions
Simplifying Fractions
Reducing Fractions to Common Denominator and Comparing Fractions
Addition and Subtraction of Fractions
Fraction Multiplication
Finding a Fraction of a Number
Reciprocal Numbers and Fraction Division
Finding a Number by Its Fraction Value
Converting Fractions to Decimals
Infinite Recurring Decimals
Decimal Approximation of Fractions