The worksheet titled "Single- and Multi-Digit Subtraction and Addition With a Focus on Vertical Stacking Alignment" contains a variety of subtraction and addition problems. Each number in the problem is surrounded by a dotted box to show students how the numbers in the problem should be aligned. The subtraction or addition symbol is also located within a box, and each digit of the answer has its own box. Subtrahends and the second addends in addition problems are highlighted to further guide attention and demonstrate proper alignment.

Each worksheet starts with single-digit subtraction so students can practice the proper alignment of their answers on simple problems. As the worksheet continues, students add and subtract double-, triple-, and four-digit numbers. Sometimes, the number of digits in the problem is the same, and sometimes, they aren't, giving students an extra challenge, especially when it comes to carrying and borrowing.

Adding and subtracting are foundational math skills for elementary students. Vertical addition and subtraction, which is also sometimes referred to as stacking, remains one of the most effective ways for students to work on addition and subtraction problems. The trick is to make sure the problem is properly aligned so students find the correct answer.

Students can complete worksheets with visual boxes around each number in the problem and answer to practice keeping all the digits properly aligned. Eventually, students can draw their own boxes around addition and subtraction problems to keep the numbers properly aligned. With enough practice seeing where the numbers go, students will no longer need the boxes in order to get the correct answer.