By LearningExpress Editors
Updated on Mar 23, 2011
Review these concepts if necessary:
 Whole Numbers Study Guide: GED Math
 Operations Study Guide: GED Math
 Real Numbers, Prime Numbers, and Absolute Value Study Guide: GED Math
 Signed Numbers Study Guide: GED Math
Problems
 10 – 5 + 2 =
 3
 –3
 –7
 7
 10
 32 – 40 ÷ 4 =
 –2
 –18
 22
 12
 42
 Estimate the answer to the nearest 10: 7 + (4 + 52) × (4 + 3) =
 70
 390
 400
 440
 2,740
 Which choice shows the prime factorization of 60?
 3 × 4 × 5
 6 × 10
 6 × (8 + 2)
 1 × 60
 2 × 2 × 3 × 5
 Find the greatest common factor of 20 and 30.
 60
 20
 5
 600
 10
 Find the least common multiple of 40 and 50.
 10
 5
 100
 200
 2,000
 Which choice shows an example of the distributive property?
 7 × (8 × 6) = (7 × 8) × 6
 7(40 + 8) = 7 × 40 + 7 × 8
 7 × 48 = 48 × 7
 7(40 + 8) = 7 × 20 + 7 × 28
 7 × 40 + 8 = 7 × (40 + 8)
 100 ÷ 5 + –5 × 3 =
 35
 75
 5
 45
 33
 Which choice shows an example of the associative property?
 12 + (49 + 51) = (49 + 51) + 12
 49 + (51 + 12) = (49 + 51) + 12
 49 + (51 + 12) = 49 + 51 + (49 + 12)
 12 + 49 + 51 = 51 + 49 + 12
 12(49 + 51) = 12 × 49 + 12 × 51
 Which example shows the commutative property?
 29 × 7 × 21 = (29 × 7) × 7 × 21
 (29 × 7) × 21 = 29 × (7 × 21)
 29 × 7 × 21 = 29 × 21 × 7
 29 × 7 × 21 = 203 × 21
 29(7 + 21) = 29 × 7 + 29 × 21
 Which of the following will result in an evennumber answer?
 3 × 7
 2 + 3
 5 × 9
 7 + 5
 1 × 7
 3 × –7 =
 –21
 –4
 4
 10
 21
 25 + 15 × 3 =
 120
 30
 15
 70
 13
 8 – 10 ÷ 2 =
 –1
 1
 3
 –3
 9
 5 × (6 + 19) =
 49
 125
 115
 5
 –5
 12 + 144 ÷ (8 + 4) =
 24
 16
 144
 32
 34
 120 ÷ 5 × –2 =
 12
 –50
 –48
 48
 50
 Which example shows the prime factorization of 90?
 9 × 10
 90 × 1
 2 × 3 × 3 × 5
 2 × 5 × 9
 3 × 3 × 10
 Which choice shows an example of the distributive property?
 5 × 27 = 27 × 5
 5(20 + 7) = 5 × 20 + 5 × 7
 5 × (9 × 3) = (5 × 9) × 3
 5(20 + 7) = 2 × 15 + 5 × 7
 5 × 20 + 7 = 5 × (20 + 7)
 What is the greatest common factor of 48 and 120?
 12
 2
 240
 3
 24
 What is the least common multiple of 20 and 30?
 20
 30
 600
 60
 10
 Estimate the answer to the nearest ten: 35 – 5 + 7 =
 20
 30
 35
 40
 50
 Which of the following will result in an oddnumber answer?
 36 + 48
 20 × 8
 37 + 47
 7 × 12
 13 + 12
 –25 ÷ 9 – 4 =
 –30
 –20
 –5
 5
 13

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