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