"I love Math Mistakes"

2022-07-06 04:42:04

Skip to the contentSearchMath MistakesMenuAboutRandom PostBaldermathComplex Number LessonsSearchClose searchClose MenuAboutRandom PostBaldermathComplex Number LessonsMath MistakesHey, welcome to the Math Mistakes website. My name is Michael Pershan, by the way. I am a math teacher in NYC. I have other websites and am active on twitter. The purpose of this site is to collect, organize and make sense of the mistakes that students make while doing math. I’m also increasingly interested in using mistakes to help us create worked examples that students can learn from. This site has been around since 2012. (Here’s the first post.)RSS - PostsRSS - CommentsThis work is licensed under a Creative Commons Attribution 3.0 Unported License.ArchivesArchivesSelect Month February 2021 October 2020 June 2018 March 2018 May 2017 November 2016 September 2016 June 2016 May 2016 February 2016 January 2016 December 2015 November 2015 October 2015 August 2015 July 2015 June 2015 April 2015 January 2015 December 2014 October 2014 September 2014 August 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 Flavors of Mistakes1.NBT.2 (1)2.OA.1 (1)3.NF.2 (2)3.OA.1 (2)5.NBT.3 (1)6.RP.3 (1)8.EE.1 (2)8.EE.4 (1)8.EE.7 (2)A-REI.1 (1)A-REI.3 (1)A-REI.4 (1)A-SSE.2 (1)Absolute Value (3)Addition (6)Algebra 1 (13)Algebra 2 (4)Algebra in Geometry (1)Analysis (2)Arc Length (1)Area (1)Area (3)Area (5)Arithmetic (3)Arithmetic with Polynomials and Rational Expressions (11)Building Functions (10)Calculus (3)Circle Theorems (1)Circles (3)Circles (2)Class Set (1)Complex Numbers (9)Conditional Probability and the Rules of Probability (6)Congruence (5)Congruent Triangles (1)Converting Units (2)Counting (2)Creating Equations* (4)Data (1)Decimals (12)Decimals (3)Derivatives (5)Discussion (1)Distance Between Points (2)Distributive Property (11)Division (5)Doesn't really fit anywhere (4)Elementary School (9)Equality (1)Equations of Parallel and Perpendicular Lines (2)Exact Values of Trig Functions (4)Experiments (2)Exponential Functions (2)Exponents (5)exponents (26)Exponents (3)Expressing Geometric Properties with Equations (4)Expressions (1)Expressions (11)Expressions & Equations (10)Expressions & Equations (5)Expressions and Equations (28)F-BF.1 (2)F-IF.7 (1)factoring (7)Feedback (36)Fractions (4)Fractions (32)Functions (9)Functions (1)G-GPE.2 (1)G-SRT.10 (1)G.CO.10 (1)Geometric Measurement and Dimension (13)Geometry (3)Geometry (2)Geometry (3)Geometry (4)Geometry (4)Geometry (4)Geometry (9)Geometry (1)Geometry (8)Grade 3 (4)Grade 4 (5)Graphing (2)Graphing (9)Graphing Trig Functions (1)High School: Algebra (1)High School: Functions (6)High School: Geometry (4)High School: Modeling (2)High School: Number and Quantity (1)High School: Statistics and Probability (3)horizontal and vertical lines (1)Infinite Series (1)Integration (1)Interpreting Categorical and Quantitative Data (3)Interpreting Functions (8)Inverse Trig Functions (1)Inverses (2)Isosceles Triangles (2)Law of Cosines (1)Law of Sines (4)Limits (3)linear functions (10)Linear, Quadratic, and Exponential Models* (20)logarithms (6)Matrices (1)Max/Min Problems (1)Measurement & Data (4)Measurement & Data (1)Measurement & Data (2)Measurement & Data (1)Measurement & Data (1)Middle School (4)Midpoint (1)Money (2)Multiplication (21)Multiplying Polynomials (5)My Mistakes (2)N-RN.2 (1)N.CN.2 (1)N.RN.1 (1)Naming Coordinates (1)Negative Numbers (2)Negative Numbers (11)Number & Operations — Fractions (13)Number & Operations in Base 10 (2)Number Theory (2)Numbers & Operations — Fractions (4)Numbers & Operations — Fractions (13)Numbers & Operations in Base 10 (10)Numbers & Operations in Base 10 (25)Numbers & Operations in Base 10 (7)Numbers & Operations in Base 10 (2)Operations & Algebraic Thinking (1)Operations & Algebraic Thinking (2)Operations & Algebraic Thinking (1)Operations and Algebraic Thinking (3)Patterns (2)Perimeter and Volume (3)Place Value (6)Probability (5)Proofs (4)Pythagorean Theorem (10)Quadratic Functions (3)Quadratic Functions (4)Quadratics (8)Quadrilaterals (4)Radicals (5)Radicals (1)Rates (3)Rates of change (1)Rational Expressions (3)Rational Expressions (7)Rational Functions (1)Ratios & Proportional Relationships (4)Ratios & Proportional Relationships (3)Ratios and Proportions (7)Reasoning with Equations and Inequalities (16)Right Triangles (6)Rounding (1)Scientific Notation (2)Seeing Structure in Expressions (13)Sequences and Series (1)Series (4)Similar Figures (7)Similarity, Right Triangles and Trigonometry (15)Simplifying expressions (4)Site Business (16)slope (7)Solving for a Variable (1)Solving Linear Equations (19)Solving Linear Inequalities (2)Solving Trig Equations (1)Square Roots (2)Standards for Mathematical Practice (2)Statistics (2)Statistics & Probability (1)Statistics & Probability (2)Subtraction (10)Surface Area and Volume (1)Systems of Equations (2)Systems of Equations (3)Tangent Lines (1)The Complex Number System (8)The Number System (3)The Number System (13)The Number System (3)The Real Number System (5)Transformations (1)Trig Identities (12)Trigonometric Functions (25)Trigonometry (5)Uncategorized (20)Vector and Matrix Quantities (3)Vectors and Matrices (2)Vertical Angles (1)Visual Patterns (1)©2022Math MistakesPowered by WordPressTo the top ↑Up ↑Loading Comments...You must be logged in to post a comment.