Nebraska Worksheet 4-Number of Children Calculation is a form used to calculate the number of children in a family or household for the purpose of child support payments in the state of Nebraska. It is used to determine the amount of child support payments that are due to the custodial parent. There are two types of Nebraska Worksheet 4-Number of Children Calculation — a worksheet for parents who are not married and a worksheet for those who are married. The worksheet requires the parent to provide information about the number of children in the family, their ages, and the amount of income the family has. The worksheet then determines the amount of child support payments that are due.