← Back to Topic 1

Evaluating Expressions: Classroom Packet

Grade 8 Algebra: Evaluating Expressions

Name: ______________________Date: ____________Score: ____ / 6

Level 1

One variable, positive values

  1. 1. Evaluate for x = 4:
    3x+23x + 2
  2. 2. Evaluate for a = 5:
    10−a10 - a
  3. 3. Evaluate for y = 6:
    y2+1\dfrac{y}{2} + 1
  4. 4. Evaluate for n = 3:
    4n−74n - 7
  5. 5. Evaluate for m = 2:
    5(m+1)5(m + 1)
  6. 6. Evaluate for k = 10:
    2k−32k - 3

Answer Key

Level 1

  1. 1. 1414
  2. 2. 55
  3. 3. 44
  4. 4. 55
  5. 5. 1515
  6. 6. 1717

Grade 8 Algebra: Evaluating Expressions

Name: ______________________Date: ____________Score: ____ / 6

Level 2

Negatives and exponents

  1. 1. Evaluate for x = -2:
    4x+94x + 9
  2. 2. Evaluate for a = 3:
    a2+1a^2 + 1
  3. 3. Evaluate for y = -3:
    y2−2yy^2 - 2y
  4. 4. Evaluate for n = -1:
    6−3n6 - 3n
  5. 5. Evaluate for m = 2:
    m3−4m^3 - 4
  6. 6. Evaluate for p = -4:
    p2−5\dfrac{p}{2} - 5

Answer Key

Level 2

  1. 1. 11
  2. 2. 1010
  3. 3. 1515
  4. 4. 99
  5. 5. 44
  6. 6. −7-7

Grade 8 Algebra: Evaluating Expressions

Name: ______________________Date: ____________Score: ____ / 6

Level 3

Several variables

  1. 1. Evaluate for x = 2, y = 3:
    4x+2y4x + 2y
  2. 2. Evaluate for a = -1, b = 4:
    a2+3ba^2 + 3b
  3. 3. Evaluate for x = 3, y = -2:
    x2−xyx^2 - xy
  4. 4. Evaluate for m = 5, n = 2:
    m+nn\dfrac{m + n}{n}
  5. 5. Evaluate for r = 3 (use π ≈ 3.14):
    πr2\pi r^2
  6. 6. Evaluate for a = 2, b = -3, c = 1:
    b2−4acb^2 - 4ac

Answer Key

Level 3

  1. 1. 1414
  2. 2. 1313
  3. 3. 1515
  4. 4. 72\tfrac{7}{2}
  5. 5. 28.2628.26
  6. 6. 11