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## Video instructions and help with filling out and completing Which Form 8815 Calculator

### Instructions and Help about Which Form 8815 Calculator

Hi everyone! I'd like to present my latest model, which is a simple Lego Technic calculator. It can addition, subtraction, and calculate the average of two numbers. On the left side, we have two sliders that can be moved back and forth. The values of these sliders are represented by the red liftarms. For example, if I have the number 2 plus the number 4, it equals the number 6. The average of 2 and 4 is represented by the yellow lifter, which in this case has a value of 3. I can lock the number 6 in place and move the sliders. At all times, these sliders will add up to the value of 6. So we can have 2 plus 4, 3 plus 3, 4 plus 2, and so on. In addition, we also have values in between. Therefore, we can calculations like 3.5 plus 2.5, which equals the value 6. If I want to do subtraction, I can set the value that I want in the middle. For example, I can set it to 5, and then the operation 5 minus 4, which equals 1. I can also lock that value in place and move the sliders. This allows us to see all the different values resulting from the subtraction. So we can say 5 minus 3 equals 2, 5 minus 2 equals 3, and 5 minus 1 equals 4. If you have any questions, please leave them in the comments. Thank you for watching.