Montgomery County school superintendent Edward Andrews yesterday recommended starting an accelerated science and math program at Montgomery Blair High School in Silver Spring and transferring students from predominantly white neighborhoods to the school to improve racial balance there.

The magnet program, recommended to the new board yesterday when it formally took office, would cost the school system $462,000 to operate annually and would include college-level courses in math, science and computer fields.

Construction of new science and computer laboratories also would carry a one-time $677,000 cost. The academic magnet, which is expected to draw 300 students, would begin in September 1984 for ninth graders and serve all four grades by September 1987.

In his plan for the high-minority school, Andrews also returned to a plan submitted last year that would transfer students to Blair from three predominantly white schools outside the Capital Beltway.

The board rejected that recommendation last year during a tumultuous series of decisions on school closings and boundary changes, but later was reversed by the state board of education whose members were concerned the decision would impact negatively on minorities.

Both actions would reduce minority enrollment at Blair, with 1,656 students, from the current 60 percent to about 50 percent.

The board is expected to act on the recommendations Jan. 24.