Some Maths

Ok ok ok .so what are  we doing today.we are doing some  some Maths !!!!!!!!!!!!!!!  so how who nose what time line are I know this cool one and I will show you it later so can you work out this one  12 22 32 42 52 62 72 82 92 102 now I'm going to give you some time to think what it is 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 ok it's  going up! in tens ok this is the one I wanted to show you so 1 1 2 3 5 8 13 21 it is 1+ 1+=2+=3+=5+=8+=1+3=+21 see i hope know what it is becase I am  taling  bb     1