Are your students still getting -9 + 1 = __ and -9 - 1 = __ horribly confused?Get ready to kiss that problem goodbye!Here are 500 worksheets and solutions - you read that right, FIVE HUNDRED worksheets and solutions - to help students extend their understanding of adding and subtracting to negative numbers.And, yes, at $50 for the entire file, it really does only cost $0.10 for each worksheet and solution page! [Odd pages are exercises and even pages are solutions.]Everything is designed to