Anita Smock (Smocki) Hoffman, 55, who had been a model, school teacher and swimming instructor before moving to Anannadale last year, died of cancer Tuesday at the Walter Reed Army Hospital.

Mrs. Hoffman was a native Deray Beach, Fla. While a teen-ager, she won statewide awards in tennis and diving. She was a 1945 gradaute of Sullins College in Bristol, Va. She then moved to New York City and worked three years a model.

In 1948 she married Hugh F.T. Hoffman Jr., now a retired Army major general. She accompanied her husband on assignments in this country and abroad. In the mid-1950s and again in the early 1970s, the Hoffmans lived in this area.

In the early 1950s, while living in Japan, she was a pre-school teacher. In the early 1960s, she taught swimming at a women's college in Kansas. She also had been a Red Cross kGray Lady and Cub Scout den mother.

She was a member of St. Alban's Espiscopal Church of Annandale.

In addition to her husband of Annandale, survivors include two sons, Army Capt. Hugh F.T. lHoffman III of West Point, N.Y., and Michael Hoffman of Colorado Springs, Colo.; a brother, Richard C. Smock of Huntsville, Ala., and one grandchild.

The family suggest that expressions of smypathy be in the form of contributions to the American Cancer Society.