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 01 Introduction to Mathematics | R Many students wonder why it's even necessary to learn in the first place. How social media knows who you're going to tag in a photo before you do. http://qindex.info/d.php?c=4816#4817

 01 Place Value | R Math Antics - Place Value http://qindex.info/d.php?c=4816#5134

 02 Addition and Subtraction of Small Numbers | R Addition and Subtraction of Small Numbers http://qindex.info/d.php?c=4816#4818

 02 Decimal Place Value | R Math Antics - Decimal Place Value http://qindex.info/d.php?c=4816#5135

 03 Multiplication and Division of Small Numbers | R Multiplication and Division of Small Numbers http://qindex.info/d.php?c=4816#4819

 03 What Is Arithmetic? | R Math Antics - What Is Arithmetic? http://qindex.info/d.php?c=4816#5136

 04 Fractions, Improper Fractions, and Mixed Numbers | R Understanding Fractions, Improper Fractions, and Mixed Numbers http://qindex.info/d.php?c=4816#4820

 04 Order Of Operations | R Math Antics - Order Of Operations http://qindex.info/d.php?c=4816#5137

 05 Factoring | R Math Antics - Factoring http://qindex.info/d.php?c=4816#5138

 05 Large Whole Numbers: Place Values and Estimating | R Large Whole Numbers: Place Values and Estimating http://qindex.info/d.php?c=4816#4821

 06 Decimals: Notation and Operations | R Decimals: Notation and Operations http://qindex.info/d.php?c=4816#4822

 06 Prime Factorization | R Math Antics - Prime Factorization http://qindex.info/d.php?c=4816#5139

 07 Working With Percentages | R Working With Percentages http://qindex.info/d.php?c=4816#4823

 08 Converting Between Fractions, Decimals, and Percentages | R Converting Between Fractions, Decimals, and Percentages http://qindex.info/d.php?c=4816#4824

 08 Multi-Digit Subtraction | R Math Antics - Multi-Digit Subtraction http://qindex.info/d.php?c=4816#5141

 09 Addition and Subtraction of Large Numbers | R Addition and Subtraction of Large Numbers http://qindex.info/d.php?c=4816#4825

 09 Multi-Digit Multiplication Pt 1 | R Math Antics - Multi-Digit Multiplication Pt 1 http://qindex.info/d.php?c=4816#5142

 10 Multi-Digit Multiplication Pt 2 | R Math Antics - Multi-Digit Multiplication Pt 2 http://qindex.info/d.php?c=4816#5143

 10 The Distributive Property | R The Distributive Property for Arithmetic http://qindex.info/d.php?c=4816#4826

 11 Basic Division | R Math Antics - Basic Division http://qindex.info/d.php?c=4816#5144

 11 Multiplication of Large Numbers | R Multiplication of Large Numbers http://qindex.info/d.php?c=4816#4827

 12 Division of Large Numbers | R Division of Large Numbers: Long Division http://qindex.info/d.php?c=4816#4828

 12 Long Division | R Math Antics - Long Division http://qindex.info/d.php?c=4816#5145

 13 Long Division with 2-Digit Divisors | R Math Antics - Long Division with 2-Digit Divisors http://qindex.info/d.php?c=4816#5146

 13 Negative Numbers | R Negative Numbers http://qindex.info/d.php?c=4816#4829

 14 Decimal Arithmetic | R Math Antics - Decimal Arithmetic http://qindex.info/d.php?c=4816#5150

 14 Understanding Exponents and Their Operations | R Understanding Exponents and Their Operations http://qindex.info/d.php?c=4816#4830

 15 Order of Arithmetic Operations: PEMDAS | R Order of Arithmetic Operations: PEMDAS http://qindex.info/d.php?c=4816#4831

 15 The Distributive Property In Arithmetic | R The Distributive Property In Arithmetic http://qindex.info/d.php?c=4816#5151

 16 Divisibility, Prime Numbers, and Prime Factorization | R The fundamental theorem of arithmetic: there is only one unique set of prime factors for any number. http://qindex.info/d.php?c=4816#4832

 16 Mean, Median and Mode | R Math Antics - Mean, Median and Mode http://qindex.info/d.php?c=4816#5152

 17 Least Common Multiple (LCM) | R Least Common Multiple (LCM) http://qindex.info/d.php?c=4816#4833

 17 Negative Numbers | R Math Antics - Negative Numbers http://qindex.info/d.php?c=4816#5153

 18 Adding & Subtracting Integers | R Math Antics - Adding & Subtracting Integers http://qindex.info/d.php?c=4816#5154

 18 Greatest Common Factor (GCF) | R Greatest Common Factor (GCF) http://qindex.info/d.php?c=4816#3761

 19 Addition and Subtraction of Fractions | R Addition and Subtraction of Fractions http://qindex.info/d.php?c=4816#3762

 19 Integer Multiplication & Division | R Math Antics - Integer Multiplication & Division http://qindex.info/d.php?c=4816#5155

 20 Intro To Exponents (aka Indices) | R Multiplication shows repeated addition and exponents show repeated multiplication. http://qindex.info/d.php?c=4816#5066

 20 Multiplication and Division of Fractions | R Multiplication and Division of Fractions http://qindex.info/d.php?c=4816#3764

 21 Analyzing Sets of Data: Range, Mean, Median, and Mode | R The median and the mode dilute the impact of anomalous data. http://qindex.info/d.php?c=4816#4938

 21 Exponents & Square Roots | R Math Antics - Exponents & Square Roots http://qindex.info/d.php?c=4816#5067

 22 Rounding | R Math Antics - Rounding http://qindex.info/d.php?c=4816#5068

 23 Basic Probability | R Math Antics - Basic Probability http://qindex.info/d.php?c=4816#5069

 Numbers, Numerals and Digits | R Numbers, Numerals and Digits http://qindex.info/d.php?c=4816#5165

 Roman Numerals | R The Romans showed numbers into the thousands using these 7 symbols: I for 1, V for 5, X for 10, L for 50, C for 100, D for 500 and M for 1000. http://qindex.info/d.php?c=4816#5038 /* Regular Expression M{1,3} ((C{1,3})([^DM]|\$))|(CD)|(DC{0,3})|(CM) ((X{1,3})([^LC]|\$))|(XL)|(LX{0,3})|(XC) ((I{1,3})([^VX]|\$))|(IV)|(VI{0,3})|(IX) */ // Javascript function 2arabic(c) {     switch(c) {         case 'I': return    1; break;         case 'V': return    5; break;         case 'X': return   10; break;         case 'L': return   50; break;         case 'C': return  100; break;         case 'D': return  500; break;         case 'M': return 1000; break;     } } var roman = 'MCMLXVIII'; var arabic = 0; var previous = 0; var current = 0; for(i=0; i
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