Pre-algebra Addition Online Crocodile Game

Pre-algebra Addition Online Crocodile Game - math game for 1st, 2nd, 3rd, 4th, 5th, 6th grades. Online crocodile games free, Crocodile Game s For Kids Online, online crocodile video games. Learn to solve linear equations that contain addition operations and a missing variable. Find the missing variable and select the correct answer. Learn while playing a game. You previously know how to add 3 + 4 & so on. But there are several ways for the addition of integers. One approach to add integers is through using a number line.
Example:
−4+(−3) =?    
You should start at zero. Your first number is negative four (-4); thus, you move four units to the left. Then you have negative three (-3), which is similar to subtracting 3; therefore, you will move three more units to the left. After that, you will get the value of negative seven (-7).
You will do the same thing when you have a positive integer; however, you will move to the right.
−4+3=−1     
You can also add integers and variables.
Example

13x+(−2) x=?
13x−2x=
(13−2) x=11x