This worksheet contains simple mathematics additions sums for grades 1,2 and 3. The sums are very simple in nature. This worksheet includes addition sums of single plus single digit, double plus single digit, and double plus double digit type. The method of addition is column addition. Enough space is provided for the students to do mathematics addition. Answer key is also provided at the end. How To: The students have to add the numbers provided in the column format. They can perform basic oper