Grade 6 Mathematics · Unit 6: Numerical and Algebraic ExpressionsStandard 6.AT.7

Lesson 6.156.15 Small Group · Group 2

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

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Learning target I can simplify algebraic expressions by combining like terms, explain why the method works, and use it on a problem I have not seen before.

Remember6.15 Small Group · Group 2

Combine only like terms, keep each sign with the term after it, and remember that a lone variable has a coefficient of 1. When you combine like terms, each term keeps the sign in front of it, and a lone variable has coefficient 1.

Words: Like Terms (Términos semejantes)Combine (Combinar)Simplify (Simplificar)Coefficient (Coeficiente)Term (Término)

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

    Simplify 8b + 5 − 3b − b + 2. What is the coefficient of b in your answer?

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

    Simplify 10g + 4 − 6g − g + 3. What is the coefficient of g in your answer?

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

    A triangle has sides x + 4, 2x and 3x − 1. Its perimeter is x + 4 + 2x + 3x − 1. Simplify it. What is the coefficient of x?

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

    Simplify 7a − 2b + 5 − 3a + 6b − a − 8. What is the constant in your answer?

    Show your work
    Final answer:

Explain your thinkingKim gave a minus sign to the wrong term. How do you decide which term a minus sign belongs to?

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