Math is one of the highest scoring subjects and by gaining a good score in math; students can have an overall commendable grade in exams. The only one thing needed to achieve good grades, is constant practice. Research suggests that math is different from other subjects and it improves student's reasoning skills. Parents are always conscious about their children and they do their level best in improving their scores in exams. Parents are also known as the first tutors so in that respect, they play a vital role in their children's lives. They can boost their children's confidence and support them to achieve their learning goals.
If you do want to produce your own worksheets and don't have the Microsoft software, you can download free tools like OpenOffice or use an online word processor or spreadsheet such as the free Google Docs which help you do similar tasks. You just need to create a table with as many rows and columns as you need and then type in some numbers before printing it off for your children to practice _ depending on the level of complexity choose single digits or multiple digits. If you're not sure what level to start at, aim low, start with easy numbers and see how your child goes, the self_esteem boost they'll get from acing the first worksheet will give them confidence for more difficult math problems.