ProportionsA proportion is a comparison of ratios. A proportion is an equation that states that two ratios are equal, such asProportions always have an EQUAL sign! A proportion can be written in two ways: In each proportion the first and last terms (4 and 2) are called the extremes. The second and third terms (8 and 1) are called the means.Determine … [Read more...] about Proportions

# Pre Algebra

## What are Laws of Exponents?

What are Laws of Exponents? Laws of Exponents Law-1: If a is any non-zero integer and m and n are whole numbers, then am × an = am + n Eg :Therefore, in general, we write,Read More:What is an Exponent? Review of Exponents SurdsLaw-2: If a and b are non-zero integers and m is a positive integer, then am × bm = (a × b)m Eg : 53 × 33 = (5 × 5 × … [Read more...] about What are Laws of Exponents?

## How do you Multiply and Divide Decimals?

How do you Multiply and Divide Decimals? Multiplication of Decimal Numbers https://www.youtube.com/watch?v=3H9DYeR5WmgMultiplication of a decimal by 10, 100, 1000 etc.:Method: On multiplying a decimal number by 10, 100, 1000, … the decimal point is shifted to the right by one, two, three, … places respectively. For example,Multiplication of a decimal by a … [Read more...] about How do you Multiply and Divide Decimals?

## How do you Add and Subtract Rational Numbers?

How do you Add and Subtract Rational Numbers? https://www.youtube.com/watch?v=pZD5jxgHit0There are four basic operations on rational numbers :Addition Subtraction Multiplication Division.Addition of Rational Numbers If two rational numbers are to be added, we first express each one of them as rational number with positive denominator. There are two … [Read more...] about How do you Add and Subtract Rational Numbers?

## Review of Exponents

Review of ExponentsExponents are the mathematician's shorthand. In general, the format for using exponents is: (base)exponent where the exponent tells you how many of the base are being multiplied together. Consider: 2 • 2 • 2 is the same as 23, since there are three 2's being multiplied together. Likewise, 5 • 5 • 5 • 5 = 54, because there are four 5's being … [Read more...] about Review of Exponents