Transcript Writing Expressions

Do Now
Solve the equation. Underline key words. Why did you solve the
problem the way you did?
Mr. Waffle is a circus clown. He starts the day
with sixty-four pieces of candy. At the end of
the day he has given away 299 pieces of
candy. How many more pieces of candy did he
have to get, in addition to his original sixty-four,
to be able to give away that many pieces?
Do Now
Solve the equation. Underline key words. Why did you solve the
problem the way you did?
Mr. Waffle is a circus clown. He starts the day
with sixty-four pieces of candy. At the end of
the day he has given away 299 pieces of
candy. How many more pieces of candy did he
have to get, in addition to his original sixty-four,
to be able to give away that many pieces?
235 pieces of candy
Writing Expressions
Key Words:
Writing Expressions
Key Words:
Addition – plus, sum, more than, increased by,
gain of
Writing Expressions
Key Words:
Addition – plus, sum, more than, increased by,
gain of
Subtraction – minus, difference, less than,
decreased by, less
Writing Expressions
Key Words:
Addition – plus, sum, more than, increased by,
gain of
Subtraction – minus, difference, less than,
decreased by, less
Multiplication – times, product, double, by, of
Writing Expressions
Key Words:
Addition – plus, sum, more than, increased by,
gain of
Subtraction – minus, difference, less than,
decreased by, less
Multiplication – times, product, double, by, of
Division – divided by, quotient, half of, separate
equally, per
Writing Expressions
Key Words:
Addition – plus, sum, more than, increased by,
gain of
Subtraction – minus, difference, less than,
decreased by, less
Multiplication – times, product, double, by, of
Division – divided by, quotient, half of, separate
equally, per
A Number = variable
Writing Expressions
Key Words:
Addition – plus, sum, more than, increased by,
gain of
Subtraction – minus, difference, less than,
decreased by, less
Multiplication – times, product, double, by, of
Division – divided by, quotient, half of, separate
equally, per
A Number = variable
Is - Equal
Writing Expressions
Examples:
Four times a number
Writing Expressions
Examples:
Four times a number = 4 X n = 4(n)
A number decreased by ten
Writing Expressions
Examples:
Four times a number = 4 X n = 4(n)
A number decreased by ten = n - 10
Eight less than a number
Writing Expressions
Examples:
Four times a number = 4 X n = 4(n)
A number decreased by ten = n - 10
Eight less than a number = n - 8
Switch the written order of numbers when you see
LESS THAN or MORE THAN
Writing Expressions
Examples:
13 - n
Writing Expressions
Examples:
13 - n = thirteen decreased by a number or
a number less than thirteen
5n
Writing Expressions
Examples:
13 - n = thirteen decreased by a number or
a number less than thirteen
5n = five times a number
n + 8 =
Writing Expressions
Examples:
13 - n = thirteen decreased by a number or
a number less than thirteen or
thirteen minus a number
5n = five times a number
n + 8 = a number increased by eight or
eight more than a number or
a number plus eight
Writing Expressions
Review Vocabulary –
Variable – a letter representing an unknown number
value
Expression – a set of symbols representing a
mathematical value/situation
Numerical Expression – a set of numbers and
operations representing a mathematical
value/situation
Algebraic Expression – a set of VARIABLES,
numbers and operations representing a mathematical
value/situation
Inverse Operations – undoing a mathematical
operation by taking its opposite