Adding Signed Numbers

Topic:
Numbers
Hi Guys, Here's a little interactive worksheet that I made to help you visualize what's happening when you add positive and negative numbers. Use the green and purple sliders to change the numbers and see what happens. Play around with it a bit and see if you can get the hang of it.
Do the following problems in your head, and then use the slider to check your answers. 9 + 8 = -6 + 8 = 3 - 9 = 5 - 4 = 3 + 12 = -4 + 9 = 0 -6 = 7 - 12 =