Shortcuts: Subtraction

Teach the student these shortcuts to help with basic subtraction.

Type: Student Strategy

Procedure:

(1) When zero is subtracted from the original number, the answer is the original number.

(2) When 1 is subtracted from the original number, the answer is the next smaller number.

(3) When the original number has the same number subtracted from it, the answer is zero.

Source: http://www.interventioncentral.org/tools/academic-intervention-planner-struggling-students

Research Citation: Miller, S.P., Strawser, S., & Mercer, C.D. (1996). Promoting strategic math performance among students with learning disabilities. LD Forum, 21(2), 34-40.