Grade 6 Mathematics · Unit 6: Numerical and Algebraic ExpressionsStandard 6.AT.6a

Lesson 6.56.5 Small Group · Group 2

Group 2 · Set BSecond challenge form · new problems, same idea

Mastery check☐ Exceeds☐ Meets target☐ Needs practice
Name Date Period

Learning target I can write an algebraic expression for a real situation and evaluate it for a given value of the variable, explain what each part stands for, and build one for a situation I have not seen before.

Remember6.5 Small Group · Group 2

An expression gives a value for every value of its variable, so substitute to compare choices and match the order of the words. Substitute values to compare two expressions. The better choice can change when the variable changes.

Words: Variable (Variable)Algebraic Expression (Expresión algebraica)Coefficient (Coeficiente)Constant (Constante)Like terms (Términos semejantes)

  1. 1Complete each step, then write the final answer.

    Write an expression for “7 less than a number n.” Then evaluate it when n = 20.

    Show your work
    Final answer:
  2. 2Complete each step, then write the final answer.

    Evaluate 12 + 2.5w when w = 6.

    Show your work
    Final answer:
  3. 3Complete each step, then write the final answer.

    Write an expression for “15 less than 3 times a number n.” Evaluate it when n = 9.

    Show your work
    Final answer:
  4. 4Complete each step, then write the final answer.

    A school sells T-shirts for $12 each. Each shirt costs $7 to make, plus a $40 setup fee one time. Write an expression for the profit on s shirts. What is the profit for 20 shirts?

    Show your work
    Final answer:

Explain your thinkingPlan A has a fee and Plan B does not. Why can the cheaper plan change when the number of months changes?

How did it go? ☐ 4 · I can teach it☐ 3 · I've got it☐ 2 · I need a hint☐ 1 · I need help