Evaluating Expressions
Grade 6 · Math · Expressions and Equations · Ohio, USA
Lesson Summary
Plug in a value for the variable and simplify to find the result of an expression.
Explanation
Evaluating an expression means replacing the variable with a given number and then doing the arithmetic. For example, if the expression is 3x + 2 and x = 4, you calculate 3 times 4 plus 2, which equals 14. Always follow the order of operations: parentheses first, then exponents, then multiplication and division from left to right, and finally addition and subtraction from left to right. This process lets you test different values and see how changing the variable changes the result.
Practice Questions
Q1: Evaluate 5n - 3 when n = 6.
Answer: 27 (5 times 6 is 30, minus 3 is 27).
Q2: Evaluate 2(x + 4) when x = 3.
Answer: 14 (3 + 4 is 7, times 2 is 14).
Q3: Evaluate a^2 + b when a = 3 and b = 5.
Answer: 14 (3 squared is 9, plus 5 is 14).
People Also Ask
What is Evaluating Expressions in Grade 6 Math?+
Evaluating Expressions is a lesson in the Expressions and Equations chapter of Grade 6 Math. It is part of the Ohio, USA school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Evaluating Expressions?+
Evaluating Expressions is taught in Grade 6 as part of the Math curriculum in Ohio, USA.
How can I help my child with Expressions and Equations in Math?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Expressions and Equations topics.