Evaluating Expressions

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Tags

CCSS.6.EE.A.2B

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with given numbers.

Tags

CCSS.6.EE.A.2C

Front

Evaluate: a² - b² if a=4 and b=-2.

Back

12

Tags

CCSS.6.EE.A.2C

Front

Evaluate: 5m + 9n if m = -7 and n = 4.

Back

1

Tags

CCSS.6.EE.A.2C

Front

Evaluate: x² - xy if x = 8 and y = -3.

Back

88

Tags

CCSS.6.EE.A.2C

Front

Evaluate: ½(10p - 7q) if p = 9 and q = 2.

Back

38

Tags

CCSS.6.EE.A.2C

Front

Evaluate: (18 - ab) + 4b if a = -2 and b = -5.

Back

-12

Tags

CCSS.6.EE.A.2C

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign, while an equation states that two expressions are equal.

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value in an expression or equation.

Tags

CCSS.6.EE.A.2B

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Tags

CCSS.7.NS.A.3