This free vertical addition worksheet is designed for students practicing adding numbers between 10 and 20. It's a simple, no-prep printable perfect for math centers, quick assessments, homework, or early finishers. Each page includes 16 vertical addition problems, conveniently providing answers for easy grading. Key Features:Adds numbers between 10 and 2016 vertical math problems on one pageAll sums are less than 40Ideal for grades 1–2 or review for higher levelsAnswer key includedHow to Use