well, kb and naruto would win. I don't think it will be easy for madara to control all 7 beasts at once. He would just summon them and let them do their havoc but madara was taking out his rinnegan and we all know how Nagato used them. Madara is probably planning to do the same. He will use the rinnegan to control all the beasts at once. All the 7 tail beast will have the rinnegan and madara will have control over them with a shared vision. In this case it would be hard for naruto and kb to even defeat all the 7 tailed beasts.
1+2+3+4+5+6+7+8+9=45
instead of just 10 tails it should be called 45 tailed. Every beast except Shukaku has more than 1 tail. So what happens with the other tails, when all those chakra beasts fuse into 10 tailed by Gedo Mazo probably? (Madara needs theem all to awaken the Jubi). Thats the point
This logic is wrong. The tails are just levels of chakra power and they increase by 1. If your logic were to be true then it has to be true for all the beasts as well. Base on your logic, you are just adding the tails of the demons. What if you had only 1 tail demon beast. How can you make it go higher? 1+0=1 wouldn't work because the tails would never go higher than one. What is the pattern of 1,2,3,4,5,6,7,8,9? The pattern is that they are all increasing by 1. What number follows after 9 based on that pattern? the answer is simple and it's 10. This is logic. It makes sense. Your logic doesn't make sense at all