5.OA.2: Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. For example, express the calculation “add 8 and 7, then multip ly by 2” as 2 × (8 + 7). Recognize that 3 × (18932 + 921) is three t imes as large as 18932 + 921, without having to calculate the indicated \ sum or product. OA.2 Students use their understanding of operations and grouping symbols to write expressions and interpret the meaning of a numerical expression. Examples: • Students write an expression for calculations given in words such as “divide 144 by 12, and then subtract 7/8.” They write (144 ÷ 12) – 7/8. 5. • Students recognize that 0.5 x (300 ÷ 15) is ½ of (300 ÷ 15) without calculating the quotient. Example: Write an expression for the steps “double five and then add 26.” Describe how the expression 5(10 x 10) relates to 10 x 10. *********Student (2 x 5) + 26 *********Student The expression 5(10 x 10) is 5 times larger than the expression 10 x 10 since I know that I that 5(10 x 10) means that I have 5 groups of (10 x 10). Language of Algebra http://www.math.com/school/subject2/lessons/S2U1L3GL.html http://www.mathgoodies.com/lessons/vol7/expressions.html http://www.mathgoodies.com/lessons/vol7/equations.html http://www.algebra-class.com/algebra-word-problems.html http://www.themathpage.com/alg/algebraicexpressions.htm#expressions Virginia State online for algebra- EXCELLENT http://education.jlab.org/solquiz/ http://math.about.com/od/prealgeb2/ss/Pre-Algebra-Worksheets-For-WritingExpressions.htm PDFs http://worksheetplace.com/index.php?function=DisplayCategory&showCate gory=Y&links=3&id=359&link1=40&link2=46&link3=359 http://www.glencoe.com/sec/math/studytools/cgibin/msgQuiz.php4?isbn=1-57039-8550&chapter=1&headerFile=4&state=or problems Love these word problems http://www.ixl.com/math/grade-5/write-equations-to-represent-word- http://www.ixl.com/math/grade-5/write-variable-expressions http://www.algebra4children.com/topics_algebraic_expressions.html Equations [SMART Notebook lesson] – Good Show what the equation means by drawing pictures examples Writing Expressions and Equations [SMART Notebook lesson] – Good Language of Algebra http://www.mathgoodies.com/lessons/vol7/expressions.html http://www.math.com/school/subject2/lessons/S2U1L1GL.html#sm1 http://www.math.com/school/subject2/lessons/S2U1L3GL.html http://www.mathpower.com/qztrans.htm cards/ http://quizlet.com/11100723/language-of-algebra-at-hcc-for-yr-7-flash- http://www.math.com/school/subject2/practice/S2U1L4/S2U1L4Pract.html http://www.math.com/school/subject2/S2U1Quiz.html Math Goodies – Order of Operations http://www.mathgoodies.com/lessons/vol7/order_operations.html Good Order of operations game http://mathwire.com/games/numbsensegames.html PEMDAS http://teachers.henrico.k12.va.us/math/ms/c20708/01NumberSense/13SimpNumExpres.html Math Playground http://www.mathplayground.com/common_core_state_standards_for_ mathematics_grade_5.html Khan Academy Video http://www.khanacademy.org/math/arithmetic/order-ofoperations/v/introduction-to-order-of-operations Elementary List of Algebra Assignments – Excellenthttp://www.mathpower.com/mth3hmwk.htm Equation Match Interactive Game- students really need to understand concept before they can do this. http://www.bbc.co.uk/education/mathsfile/shockwave/games/equati onmatch.html Number Cards so students can make arrangements of numbers on their desks as I say algebraic equations: http://www.senteacher.org/wk/numbercards.php Domai n: Oper ations and Algebraic Thi nki ng Grade: 5 Assessment Tasks Used Skill-Based Task: Students write an expression for calculations given in words such as the following: “Divide 144 by 12, and then subtract 7.” They write (144 ÷ 12) – 7. __________________________________________________________ Problem Task: Mara bought 6 bags of Skittles at $0.85 each and 9 packs of gum at $1.20 each for a sleepover. Express what she purchased mathematically. Answer: (6 x 0.85) + (9 x 1.20) __________________________________________________________ Extension: Mara bought 6 bags of Skittles at $0.85 each and 9 packs of gum at $1.20 each for a sleepover. She still didn’t think she would have enough snacks. She went to the store the next day and bought the same number of items again. Express what she purchased mathematically. Answer: 2 x [(6 x 0.85) + (9 x 1.20)] or 2[(6x0.85)+(9x1.20)] Explain your reasoning. How do you know your expression fits the problem? http://www.helpingwithmath.com/by_grade/grade5/5OA01.htm Great Link to turning words into algebraic equations http://www.helpingwithmath.com/printables/worksheets/equations_e xpressions/5oa2expressions02.htm Writing Expressions Using Parentheses http://www.helpingwithmath.com/printables/worksheets/equations_e xpressions/5oa1expressions01.htm Evaluating Expressions http://www.helpingwithmath.com/printables/worksheets/equations_e xpressions/5oa1expressions05.htm Evaluating Expressions Post Test http://www.helpingwithmath.com/printables/worksheets/equations_e xpressions/5oa1expressions03.htm Transferring Phrases to Algebraic Expressions http://www.mathworksheets4kids.com/algebra.html Word Problems http://www.purplemath.com/modules/translat2.htm Language of Algebra http://www.math.com/school/subject2/lessons/S2U1L3GL.html Key Words http://www.algebralab.org/studyaids/studyaid.aspx?file=Algebra1_16.xml Millionaire Game http://www.math-play.com/Algebraic-ExpressionsMillionaire/algebraic-expressions-millionaire.html Study Guide http://www.studyzone.org/mtestprep/math8/d/translateexpl.cfm