In this video I used commas to separate the "leaves". This is not necessary, as each leaf is only one digit. However, in the GCSE you will not be penalised for adding commas.
For you guys who understand the first half and are confused about the other half (The Key), all you need to do is draw a box and indicate it called "Key" and write a number, for example if you want to write 10 you put 1|0 = 10 or 2|3 = 23, it can be anything but must be in that genre.
@@Maz_pro its fairly easy for example in the video the first set you can see 11, that is going to be 1|1=11cm i think it is universal across all the set of numbers
