Youtube clips describing these can be found at,

Multiplication by All from 9 and the last from 10, below the base

https://www.youtube.com/edit?o=U&video_id=DATb5slHeMc

Multiplication by All from 9 and the last from 10, above the base

https://www.youtube.com/edit?o=U&video_id=VRsT2Q8orQw

Multiplication by All from 9 and the last from 10 with vinculums

https://www.youtube.com/edit?o=U&video_id=L9ofWNzHECQ

Multiplication by Vertically and Crosswise

https://www.youtube.com/edit?o=U&video_id=uVEv3jh6hsI

Multiplying two 3-digit numbers in one line

https://www.youtube.com/edit?o=U&video_id=xcsUTohBkvY

Multiplying two 4-digit numbers in one line

https://www.youtube.com/edit?o=U&video_id=a3j7h9dTw9k

Decimal multiplication

https://www.youtube.com/edit?o=U&video_id=_KeZSoMI_Mg

Squaring numbers ending in 5

https://www.youtube.com/edit?o=U&video_id=78yTDlqGyA0

Squaring numbers close to the power of 10

https://www.youtube.com/edit?o=U&video_id=s8mBZps1XhY

Cubing a 2-digit number

https://www.youtube.com/edit?o=U&video_id=4M8tqh5Xbmk

BBB

BBW

BWB

WWB

WBW

WWW

This would indicate that the pattern would be 1 (0 beads), 2 (1 bead), 3 (2 beads), 6 (three beads). What am I not understanding?

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