W10 L3-4 Write Algebraic Expressions (1)

At the end of this lesson,

you will be able to:

• Use variables to write algebraic expressions.

Grade 6 T. Noha Barada

​L3-4 Write Algebraic Expressions

​

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What is a variable (in math)?

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What is an algebraic expression?

Give an example of an algebraic expression.

​a letter or symbol that represents an

unknown quantity.

​​Variable

​

​an expression that has one or more variables and at least one operation.

​​Algebraic Expression

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Multiple Choice

Identify the operation in the algebraic expression $$7+m$$  .

• addition

• subtraction

• multiplication

• division

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Multiple Choice

if a + b = 12, can both a and b have the same value that is 6?

• yes

• no

Multiple Choice

Identify the operation in the algebraic expression $$\frac{c}{8}$$  .

• addition

• subtraction

• multiplication

• division

Multiple Choice

What does 3s mean in algebra?

• 3 + s

• 3 - s

• 3 x s

• 3 / s

Multiple Choice

Identify the operation in the algebraic expression $$15w$$  .

• addition

• subtraction

• multiplication

• division

Multiple Select

Identify the operation(s) in the algebraic expression $$2\left(h+15\right)$$  . Choose all that apply.

• addition

• subtraction

• multiplication

• division

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What is a coefficient in math?

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What is a constant in math?

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What is a term in math?

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​G6 T. Noha Barada

​Parts of an algebraic expression

​

• The coefficient is the number multiplied by the variable​.

• The constant is the fixed value, the number that is on its own​.

​

• Each part of an expression that is separated by a plus sign or a minus sign is called a term.​

​G6 T. Noha Barada

​Parts of an algebraic expression

​

• five minutes more than time t.

• ​ten erasers decreased by a number n.

• o oranges shared equally by three kids.

• 4 times the quantity x plus 8. ​

​Group Discussion

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How can we translate a phrase or given situation into an algebraic expression?​

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• Look for key words.

• Identify the operation. ​

• Write the expression in the correct order. ​

  • Switch when you see less than & more than​

  • Add ( ) when the phrase has the word quantity

​G6 T. Noha Barada

​How to translate a phrase or a given situation into an algebraic expression?

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