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Numbers and Operations Practice Problems: GED Math

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Updated on Mar 23, 2011

Review these concepts if necessary:

Problems

  1. 10 – 5 + 2 =
    1. 3
    2. –3
    3. –7
    4. 7
    5. 10
  2. 32 – 40 ÷ 4 =
    1. –2
    2. –18
    3. 22
    4. 12
    5. 42
  3. Estimate the answer to the nearest 10: 7 + (4 + 52) × (4 + 3) =
    1. 70
    2. 390
    3. 400
    4. 440
    5. 2,740
  4. Which choice shows the prime factorization of 60?
    1. 3 × 4 × 5
    2. 6 × 10
    3. 6 × (8 + 2)
    4. 1 × 60
    5. 2 × 2 × 3 × 5
  5. Find the greatest common factor of 20 and 30.
    1. 60
    2. 20
    3. 5
    4. 600
    5. 10
  6. Find the least common multiple of 40 and 50.
    1. 10
    2. 5
    3. 100
    4. 200
    5. 2,000
  7. Which choice shows an example of the distributive property?
    1. 7 × (8 × 6) = (7 × 8) × 6
    2. 7(40 + 8) = 7 × 40 + 7 × 8
    3. 7 × 48 = 48 × 7
    4. 7(40 + 8) = 7 × 20 + 7 × 28
    5. 7 × 40 + 8 = 7 × (40 + 8)
  8. 100 ÷ 5 + |–5 × 3| =
    1. 35
    2. 75
    3. 5
    4. 45
    5. 33
  9. Which choice shows an example of the associative property?
    1. 12 + (49 + 51) = (49 + 51) + 12
    2. 49 + (51 + 12) = (49 + 51) + 12
    3. 49 + (51 + 12) = 49 + 51 + (49 + 12)
    4. 12 + 49 + 51 = 51 + 49 + 12
    5. 12(49 + 51) = 12 × 49 + 12 × 51
  10. Which example shows the commutative property?
    1. 29 × 7 × 21 = (29 × 7) × 7 × 21
    2. (29 × 7) × 21 = 29 × (7 × 21)
    3. 29 × 7 × 21 = 29 × 21 × 7
    4. 29 × 7 × 21 = 203 × 21
    5. 29(7 + 21) = 29 × 7 + 29 × 21
  11. Which of the following will result in an even-number answer?
    1. 3 × 7
    2. 2 + 3
    3. 5 × 9
    4. 7 + 5
    5. 1 × 7
  12. |3 × –7| =
    1. –21
    2. –4
    3. 4
    4. 10
    5. 21
  1. 25 + 15 × 3 =
    1. 120
    2. 30
    3. 15
    4. 70
    5. 13
  2. 8 – 10 ÷ 2 =
    1. –1
    2. 1
    3. 3
    4. –3
    5. 9
  3. 5 × (6 + 19) =
    1. 49
    2. 125
    3. 115
    4. 5
    5. –5
  4. 12 + 144 ÷ (8 + 4) =
    1. 24
    2. 16
    3. 144
    4. 32
    5. 34
  5. 120 ÷ 5 × –2 =
    1. 12
    2. –50
    3. –48
    4. 48
    5. 50
  6. Which example shows the prime factorization of 90?
    1. 9 × 10
    2. 90 × 1
    3. 2 × 3 × 3 × 5
    4. 2 × 5 × 9
    5. 3 × 3 × 10
  7. Which choice shows an example of the distributive property?
    1. 5 × 27 = 27 × 5
    2. 5(20 + 7) = 5 × 20 + 5 × 7
    3. 5 × (9 × 3) = (5 × 9) × 3
    4. 5(20 + 7) = 2 × 15 + 5 × 7
    5. 5 × 20 + 7 = 5 × (20 + 7)
  8. What is the greatest common factor of 48 and 120?
    1. 12
    2. 2
    3. 240
    4. 3
    5. 24
  9. What is the least common multiple of 20 and 30?
    1. 20
    2. 30
    3. 600
    4. 60
    5. 10
  10. Estimate the answer to the nearest ten: 35 – 5 + 7 =
    1. 20
    2. 30
    3. 35
    4. 40
    5. 50
  11. Which of the following will result in an odd-number answer?
    1. 36 + 48
    2. 20 × 8
    3. 37 + 47
    4. 7 × 12
    5. 13 + 12
  12. –25 ÷ |9 – 4| =
    1. –30
    2. –20
    3. –5
    4. 5
    5. 13
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