We are doing the transition lessons and we did lesson 17 today, skip counting by 5's to 5-ten. We can skip count by 5's easily on the first side of the abacus, but then I got confused about trying it on the marked side. Does the child "trade" after 10 or 20 beads or what? I got the feeling I'd missed something when we got to that lesson today.

Thank you!

Hi Marianne,

Thanks for posting your question. Yes, trade after 10 beads as in 10 ones equals one 10, 10 tens equals one 100 etc.

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Sincerely, Rosine