Can a subtraction still work with holes in it? This 3rd grade multi-digit subtraction missing digits worksheet turns column subtraction into a puzzle. A worked example rebuilds 40,325 − 7,465 = 32,860 one column at a time. Then three subtractions hide two or three digits each, in the top and bottom numbers. The answer box already shows the result. Your child works from the ones column to the left. A second page gives the answer key.