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