Addition of 1 to Other Numbers Quiz – A math exercise in which are required to add one to other numbers. This is a basic skill in addition kids will learn in first grade. The activity is a gap-fill exercise and in some cases MCQ quiz. Children will solve each problem and type in the correct answer. At the end of each exercise the score will be displayed. Review on the go be it at home or in the classroom. Math exercise for kindergarten, 1st, 2nd and 3rd grades.