Multiplying by an Unknown

Why do we use letters in math?

• To show the math operation

• To hold the place of unknown numbers

• To replace reciprocals

• To confuse students

Tags

CCSS.6.EE.B.6

A number in front of, and multiplying, a variable. A value that can change based on the variable (it changes when multiplied by the variable).

• Coefficient

• Symbol

• Constant

• Variable

Tags

CCSS.6.EE.A.2B

A number multiplied by ("attached to") a variable

3x

• variable

• term

• coefficient

• factor

Tags

CCSS.6.EE.A.2B

Multiplying a number outside the parentheses by each term inside the parentheses (double rainbow!) 4(2x -1) = 8x - 4

• associative property

• commutative property

• distributive property

• like terms

Tags

CCSS.6.EE.A.3

What is the value of the unknown in the equation below?

54 = ? x 9

Tags

CCSS.3.OA.A.4

What is the value of the unknown in the equation below?

54 = ? x 9

Tags

CCSS.3.OA.A.4

What is the value of the unknown in the equation below?

54 = ? x 9

Tags

CCSS.3.OA.A.4

A letter that represents an unknown value

• evaluate

• variable

• term

• coefficient

Tags

CCSS.6.EE.A.2B