You will need to round the 2 values in the expression to the ten thousand place and then subtract them for the estimated answer. 24,953-13,758 (Original Expression) 24,953 is closer to 25,000 than 24,000, and 13,758 is closer to 14,000 than 13,000. 25,000-14,000 (Estimated Expression) 11,000 (Subtract to simplify the expression) The answer is 11,000.