Substitution

Front

What is substitution in mathematics?

Back

Substitution is the process of replacing a variable with a specific value or expression in an equation or expression.

Tags

CCSS.6.EE.A.2C

Front

How do you evaluate an expression with given values for its variables?

Back

To evaluate an expression, substitute the given values for the variables into the expression and perform the arithmetic operations.

Tags

CCSS.6.EE.A.2C

Front

What is the result of the expression 15 - a - b when a = 6 and b = 7?

Back

The result is 2.

Tags

CCSS.6.EE.A.2C

Front

How do you calculate the value of an expression like 3y + 5 when y = 4?

Back

Substitute 4 for y in the expression to get 3(4) + 5 = 17.

Tags

CCSS.6.EE.A.2C

Front

What is the value of 3b + e when b = 7 and e = 2?

Back

The value is 23.

Tags

CCSS.6.EE.A.2C

Front

How do you solve an expression like 14 - cd when c = 2 and d = 7?

Back

Substitute 2 for c and 7 for d to get 14 - (2)(7) = 0.

Tags

CCSS.6.EE.A.2C

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Tags

CCSS.7.NS.A.3

Front

In the expression 12 ÷ 3 x 4, what operation should be performed first?

Back

According to the order of operations, you should perform the division first: 12 ÷ 3.

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Front

What is the value of the expression 12 ÷ 3 x 4 after performing the first operation?

Back

After performing the first operation, the value is 4 x 4 = 16.

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

Front

What does it mean to evaluate an expression?

Back

Evaluating an expression means calculating its value by substituting variables with numbers and performing the necessary operations.

Tags

CCSS.6.EE.A.2C