Drag the tiles to the correct boxes to complete the pairs.
Match the subtraction expressions with their answers.

1) 2/a^2b^3-1/ab
2) 1/ab^2-1a^3b
3) 2/a^3b^3-1/a^2b^3
4) 1/a^3b^2-1/a^2b^3

A) a^2-b/a^3b^2
B) b-a/a^3b^3
C) 2-ab^2/ a^2b^3
D) 2-a/a^3b^3