Back to Math home page

Pre Algebra Concepts

Prime numbers and prime factoring

• Prime numbers
• Prime factoring

Common factor and greatest common factor

• Common Factors
• Greatest Common Factor (GCF)

Simplify fraction and equivalent fractions

• Simplify fraction
• Equivalent fractions

Complex fractions

• Complex fraction when numerator is a fraction
• Complex fraction when denominator is a fraction
• Complex fraction when both numerator and denominator are fractions

Least common multiple and denominator

• Least Common Multiple (LCM)
• Least Common Denominator (LCD)

Compare fractions

• Compare fractions with common denominators
• Compare fractions with different denominators
• Compare fractions with same numerators and different denominators

Fraction and mixed number

• Improper fraction to mixed number
• Mixed number to fraction

Add fractions

• Add fractions with the same denominator
• Add fractions with different denominators

Add mixed numbers

• Add mixed numbers with the same denominator
• Add mixed numbers with different denominators

Subtract fractions

• Subtract fraction with the same denominator
• subtract fractions width different denominators

Subtract mixed numbers

• Subtract mixed number with the same denominator
• Subtract mixed number with different denominators

Multiply fractions

• Multiply fractions
• Multiply fraction by mixed number
• Multiply mixed numbers

Divide fraction or mixed number

• Divide a whole number by a fraction
• Divide a fraction by a fraction
• Divide a fraction by a mixed number
• Divide mixed number by mixed number

Other

• Rational numbers
• Positive exponents and zero exponent
• Negative exponents

To Lean pre-algebra

In pre-algebra section, there are basic rules for arithmetic operation. For example, what is the common factors? What is the greatest common factor (GCF)? What is the simplest form of a fraction? What is the least common denominator (LCD)? How to comparing fractions with common denominators? How to comparing fractions with different denominators? How to compare fractions with the same numerators and different denominators? How to change a mixed number to a fraction? How to add two fractions with the same denominator? How to add two fractions with different denominators? How to add two mixed numbers with the same denominator? How to add two mixed numbers with different denominators? How to subtract two fractions with the same denominator? How to subtract two fractions with different denominators? How to subtract two mixed numbers with the same denominator? How to subtract two mixed numbers with different denominators? How to multiply two fractions? How to divide two fractions? Why do we need to use a fraction? Look the example, on hour is 60 minutes, then 20 minutes is how many hours? The 20 minutes is 20/60 = 1/3 hours which is a fraction. So, a part of whole can be expressed as a fraction. There are a lot of operation rules in Pre-algebra, it is the foundation of the algebra. The more you practice, the more you will understand.