Hi Mike,
I assume you got this far:
Clicked on B2 of Sheet 6, typed = and then went to Sheet 1 Table 1. Clicked on B2 of that table, then enter (return) key.
Cell B2 of Sheet 6 should now be selected. If not, click on it once to select it.
The white circle on the bottom right of Cell B2 of Sheet 6 is the Fill Handle. Drag the handle down to Fill Down.
If your Numbers document is set up as in my screenshot, you can also fill B2 on Sheet 6 across to copy the formula for the other sheets.
You can download the Numbers User Guide from the Numbers Help Menu. Well worth a read.
Ian.