Make numbers a part of your everyday routine. Your child might not like addition, but he may enjoy counting the number of stop signs on the drive to school or the number of stairs on your porch. Lead by example to encourage your child to think of math exercises as a part of his daily routine.
Maybe you're teaching your kids about problem-solving or you would like to develop their number work. I find fun math games, activities and worksheets are a fantastic way for kids to practice and consolidate math skills, but in a non-threatening and highly motivational way.