Math Puzzlers 21 to 30

Arrange the ten digits 0 to 9 in three arithmetical sums, using three of the four operations of addition, subtraction, multiplication, and division, and using no signs except the ordinary ones implying those operations.  Here is an example to make it quite clear (note that the example is not correct):

3 + 4 = 7          9 - 8 = 1          5 X 6 = 30