A great way to practice adding negative and positive numbers! Use 4 Dice of two different colors. I use two red and two green. The red are negative and the green are positive. On each turn roll the dice and the students can add the four numbers together. Each card has a variety of numbers from -10 to 10. Some cards have some numbers twice. Students should cover only one number per roll.
I print these cards on colored paper and place them in a page protector. Students can then use dry erase markers instead of chips to cover called numbers.
This is a great and fun way to reinforce the concept of negative numbers!