__  1.  (4 + 6) + 3 = 4 + (6 + 3)   A.  the middle number in a set of data  __  2.  3, 2   B.  the number that occurs most often in a set of data  __  3.  4 + 9   C.  difference between the largest & smallest numbers in data  __  4.  4 + 9 = 9 + 4   D.  a number with more than two factors  __  5.  4 + 9 = 13   E.  a number with only two factors, one and itself  __  6.  composite number   F.  expression  __  7.  median   G.  equation  __  8.  mode   H.  commutative property  __  9.  prime number   I.  associative property  __  10.  range   J.  ordered pair 
__  11.  1, 2, 3, 4, 6, 12   A.  front end estimation  __  12.  3, 6, 9, 12   B.  rounding to ten thousands place  __  13.  27,000 becomes 20,000   C.  the point where two lines cross  __  14.  27,000 becomes 30,000   D.  answer to multiplication problem  __  15.  fact family   E.  the first 4 multiples of 3  __  16.  factors   F.  the factors of 12  __  17.  intersection   G.  2 + 3 = 5, 3 + 2 = 5, 5  2 = 3, 5  3 = 2  __  18.  multiple   H.  the numbers mulitplied together to get a product  __  19.  product   I.  the product of a whole number and any other whole number 
