Subtraction Concept and Problem Solving Definition of Subtraction, Parts of Subtraction, Facts of Subtraction are explained. Some tricky Subtraction problems are solved and explained for grade 2,3,4 and 5 level. We deal with Subtraction Problems like missing digits, missing numbers, who am I, finding Minuend, subtrahend when one of them is missing, regrouping twice and thrice, subtraction with zeros using animated PPT.