Transcript File - Miss Frederick`s Classroom

1-11
6th grade math
Writing Expressions
Objective
• To translate word phrases into algebraic
expressions.
• Why? To master another aspect of Algebra
and Functions in 6th grade math (and beyond).
Being able to write expressions is a key
component in Algebra and other higher math
when solving any kind of word problem.
California State Standards
AF 1.2: Evaluate an algebraic expression for a given
situation, using up to three variables.
AF 1.3: Apply algebraic order of operations and the
commutative, associative, … properties to
evaluate expressions…
MR 3.0: Move beyond a particular problem by
generalizing to other situations.
Chart of terms for the 4 operations.
Vocabulary
Sum
Difference*
Product
Quotient*
Add
Subtract
Multiply
Divide
And
Less than
In all
Altogether
* Order matters in is VERY important!
Remember about parentheses: 6 times the sum of y and 1 = 6 x (y + 1) or 6(y + 1)
How to Write Expressions
1) Read the statement and
understand what you are
being asked to do.
2) Look for the key words to
translate into operations
(+, -, x, ÷).
3) Look for “is” to translate to
=.
4) Parentheses are used to
arrange in a certain order.
4) Write out your expression
or equation and check
your work.
A) A sum of a number and 3.
=x+3
B) 37 increased by 5
= 37 + 5
C) 10 times a number
= 10 x n or 10n or 10‧n
D) 2 less than a number
=n–2
E) A quantity more than 10
= 10 + x
Try It!
Write each phrase as an expression
1) 6 less than k
1) k – 6
2) t ÷ 8
2) t divided by 8
3) m + 3
3) m and 3 more
4) Alex raked 5 bags. Adam raked
an x amount. How many bags
were raked in all?
4) r + 5
Objective Review
• You can now translate word
phrases into algebraic expressions.
• Why? You have now mastered another aspect of
Algebra and Functions in 6th grade math (and
beyond). Being able to write expressions is a key
component in Algebra and other higher math
when solving any kind of word problem. You can
translate word phrases into mathematical
expressions using numbers, symbols, and letters.
Independent Practice
• Complete problems 514.
• Copy original problem
first.
• Show all work!
• If time, complete Mixed
Review: 15-21.
• If still more time, work
on Accelerated Math.