6.AT.8 Lesson 8-3-part2 Apply Day · Set B
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8.3 · Part II

Second Practice Form · Independent Application and Spiral Review

Solve Multiplication and Division Equations · Inverse operation

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Name: Date: Period: Learning Goal:
■ ADVANCED CONCEPT ANCHOR: 8.3 · Part II
1Solving Multiplication & Division Equations
2The Structural Procedure
  1. Identify the operation applied to the variable
  2. Use the inverse operation: Divide to undo multiplication; multiply to undo division
  3. Balance: Apply the inverse operation to both sides to isolate the variable
3Mathematical Word Bank
  • Solve Multiplication and Division Equations (Resolver ecuaciones de multiplicación y división) — Use inverse multiplication or division to isolate the variable.
  • Inverse operation (Operación inversa) — Two math actions that undo each other, like × and ÷.
  • Multiply (Multiplicar) — To add equal groups again and again.
  • Divide (Dividir) — To split into equal groups.
  • Isolate (Despejar) — To get the letter by itself on one side.
  • Coefficient (Coeficiente) — The number in front of a letter, like the 3 in 3x.
4Watch out
  • A common mistake in Solve Multiplication and Division Equations is applying the SAME operation again instead of the inverse — for example, seeing 6x = 42 and multiplying both sides by 6 to get x = 252, instead of dividing by 6 to get x = 7. Before you submit, ask: did I use the OPPOSITE operation shown in the equation, and did I apply it to both sides?
SECTION 1 REAL-WORLD CONTEXTS & PROBLEM SOLVING [Applications]
  1. 1 MULTIPLE CHOICE

    (Lesson 8.2) Solve: x + 9 = 15

    1. Ax = 6
    2. Bx = 24
    3. Cx = 9
    4. Dx = 15
    ✏️ Workspace & Solution Steps
  2. 2 MULTIPLE CHOICE

    (Lesson 8.2) Solve: y − 7 = 20

    1. Ay = 27
    2. By = 13
    3. Cy = 7
    4. Dy = 140
    ✏️ Workspace & Solution Steps
  3. 3 MULTIPLE CHOICE

    Vault C is sealed with 5n = 45. Crack the lock: what is n?

    1. An = 9
    2. Bn = 225
    3. Cn = 40
    4. Dn = 50
    ✏️ Workspace & Solution Steps
  4. 4 MULTIPLE CHOICE

    Solve: 6x = 42

    1. Ax = 7
    2. Bx = 48
    3. Cx = 36
    4. Dx = 252
    ✏️ Workspace & Solution Steps
  5. 5 MULTIPLE CHOICE

    Solve: n / 3 = 8

    1. An = 24
    2. Bn = 11
    3. Cn = 5
    4. Dn = 3
    ✏️ Workspace & Solution Steps
  6. 6 MULTIPLE CHOICE

    Solve: 9m = 63

    1. Am = 7
    2. Bm = 54
    3. Cm = 72
    4. Dm = 567
    ✏️ Workspace & Solution Steps
SECTION 2 MATHEMATICAL WRITING & ERROR ANALYSIS [Reasoning & Critique]
  1. 7 OPEN RESPONSE

    A bakery packed muffins into boxes of 8. They made 96 muffins total. Write an equation, solve it, and explain why your answer is reasonable. Then write a different situation that uses division and has the same answer.

    ✏️ Mathematical Justification & Response
📐 CER MATHEMATICAL PROOF MATRIX (CER 2.0) SMP.3 / Proof & Justification

Writing Task: Justify why your mathematical solution is accurate and complete.

C Claim
State your direct mathematical answer/claim with units.
E Evidence
Cite exact numbers, calculations, dimensions, or graph data.
R Reasoning
Explain the mathematical theorem, property, or definition connecting evidence to claim.
Student Mastery Self-Assessment:
1 · Need More Support
2 · Getting Closer
3 · Got It / Solid
4 · Master / Can Teach It