Variables and expressions

Variables and Expressions

Monday 28, 2020

Open Ended

What are the four steps to solving a mathematical problem?

Objective

• Translate between words and algebra

• Evaluate algebraic expressions

Vocabulary

• Variable - a letter or a symbol used to represent a value that can change.

• Constant - a value that does not change.

• Numerical expression - may contain only constants and/or operations.

• Algebraic expression - may contain variables, constants, and/or operations. 

  Evaluate

  
  

Translate

You will need to translate between algebraic expressions and words to be successful in math. The diagram below shows some of the ways to write mathematical operations with words.

Translate

• +, Plus, Sum, Increased by

• _{−, Minus, Difference, Less than}

• x, Times, Product, Equal groups of

• ^{÷, Divided by, quotient}

Examples of Translated Expressions

• x+3 we can say,"the sum of x and 3" or we can say, "x increased by 3"

• m-7 we can say,"the difference of m and 7" or we can say, "7 less than m"

• 2(y) we can say, " 2 times y" or we can say, "the product of 2 and y"

• k÷5 we can say, " k divided by 5" or we can say, " the quotient of k and 5"

Open Ended

4 - n

Open Ended

 $\frac{t}{5}$  

Open Ended

9 + q

Open Ended

3(h)