Addition Of Doubles Online Crocodile Game - math game for 1st, 2nd, 3rd, 4th, 5th, 6th grades. Online crocodile game free, Crocodile Game s For Kids Online, online basketball video games. Learn how to add a number twice. Adding numbers twice also gives students an idea of multiplying by two. This exercise is basic and suitable for children in kindergarten, 1st and 2nd grade. Adding any two following numbers can be done via utilizing doubles plus 1/doubles minus one approach.

**Example:** 2 + 3

The number 3 is one over 2. Therefore, you can write three as per 2 + 1. We know that the double of 2 is 4 and 3 s one over 2, so 4 plus 1 is equal to 5.