Teach children to add doubles ( 1 + 1 , 3 + 3, 9 + 9), math quiz for children, 1st, 2nd, 3rd grades, online test. Easy math quizzes online for kids. Test your math skills with this free Adding doubles quiz on math for children plus. Free online math tests for kindergarten to 2nd grade students.

### Addition principles

The topic of addition is one of the very basic elements in Mathematics subject. It is integral in enabling learners to understand the other diverse concepts among them, algebra et al, of Mathematics. Addition plays an inescapable role in Arithmetic. It entails the combination of quantities often expressed in numerical and the + sign. Addition is the basic step that learners are going to be taught in an Arithmetic class. Learners will get to learn how to bring together two quantities or two figures or numbers and then add the up using the knowledge of addition and thus get the total of the two or more quantities when they are brought together.