Virtual SchoolGr7-CIC

Warm Up -

Simplify expression

Evaluate expressions

Algebra vocabulary

Although they are closely related, a Great Dane weighs about 40 times as much as a Chihuahua

Although they are closely related, a Great Dane weighs about 40 times as much as a Chihuahua

An expression for the weight of the Great Dane could be 40c, where c is the weight of the Chihuahua.

Although they are closely related, a Great Dane weighs about 40 times as much as a Chihuahua

An expression for the weight of the Great Dane could be 40c, where c is the weight of the Chihuahua.

When solving real-world problems, you will need to translate words, or verbal expressions, into algebraic expressions.

Word phrases can be written as algebraic expressions.

Word phrases can be written as algebraic expressions.

• Use a variable for the phrase “a number” or unknown value.

Word phrases can be written as algebraic expressions.

• Use the words to determine what operation you are using.

• Use a variable for the phrase “a number” or unknown value.

• In order to translate a word phrase into an algebraic expression, we must first know some key word phrases for the basic operations.

In your notebook/notes:

AdditionAddition SubtractionSubtraction

MultiplicationMultiplication Division Division

Addition Phrases:

• More than

• Increase by

• Greater than

• Add

• Total

• Plus

• Sum

Subtraction Phrases:

• Decreased by

• Difference between

• Take Away

• Less

• Subtract

• Less than*

• Subtract from*

Multiplication Phrases:

• Product

• Times

• Multiply

• Of

• Twice or double

• Triple

Division Phrases:

• Quotient

• Divide

• Divided by

• Split equally

Notes

• Multiplication expressions should be written in side-by-side form, with the number always in front of the variable.

• 3a 2t 1.5c 0.4f

Notes

Division expressions should be written using the fraction bar instead of the traditional division sign.

2

c

x

3

10

y

Let’s try it.

3 more than x

Let’s try it.

the product of 3 and a number t

Let’s try it.

the difference between 10 and a number y

Let’s try it.

the quotient of 25 and a number b

Let’s try it.

32 less than 5 times c

Independent Practice

1. 2.5 divide g2. 4.2 times a number e3. the sum of 10 and a number c4. a number t decreased by 45. 6 less than a number z 6. twice the number x7. the number y divided by 28. a number n increased by 4.5