Does your child know how to add a whole and a decimal number without regrouping? Invite them to practice this concept here. Students use the relationship between addition and subtraction to find the missing number while adding decimals. They do not need to regroup the numbers in add a whole and a decimal number without regrouping worksheet to get to the result. In this worksheet, numbers are laid one on top of another (vertical format). This encourages students to use the inherent place value structure to solve the problems.