It is 1
5 and 1/2
1 add 4 is 5 and 2 add 3 make 5. 5 add 5 make 10 so 2 x 10 is 20
1 0 5 5=21 add a sign?
The rule of the Fibonacci sequence is simple. Take the previous number in the sequence, and add it to the current number. The sequence starts with 0 and 1. 0, 1 So, add 0+1=1. The sequence now contains three numbers. 0, 1, 1 Now, add 1+1=2. This brings us to four numbers. 0, 1, 1, 2 Add 1 and 2. (1+2=3) 0, 1, 1, 2, 3 Now it gets a bit tricky. Add 2+3=5, so the next number is 5. 0, 1, 1, 2, 3, 5 Continue to add the numbers accordingly. (3+5=8) 0, 1, 1, 2, 3, 5, 8 Proceed. 0, 1, 1, 2, 3, 5, 8, 13, 25, 38, 63, 101, 164...
-1+1+2+3+5= 10 First, you move 1 left of "0", which is -1. Then, you move 1 digit to the right, which puts you back at "0". Add 2, add 3, and add 5. The sum is 10.
If you mean things like 1/5 + 2/5, you just add the top numbers together, (in this case, 1+2) and because the bottom number is the same number, you just keep it the same (don't add the bottom numbers) so the answer to 1/5 + 2/5 is 3/5.
1^2+1=2, 2^2+1=5, 5^2+1=26... so to find the next number, square 25 and then add 1.
To get from 2 to 5 you are multliplying 2 by 2 and adding 1. The difference is 3. Now, to get from 5 to 11 you do the same thing - multipy 5 by 2 and add 1 to get 11. That's what you do to 23. Multlipy by 2 and add 1 to get 47.
1 and 3 2 and 2 0 and 4 -1 and 5
1/5 x 2/2 = 2/10 2/10 + 3/10 = 5/10 = 1/2
The pattern is Add 1, then 2, then 1, then 2 again. Easy!