Foundation to Year 2: 6 beads
If you put three beads onto a tens/units abacus you could make the numbers 3, 30, 12 or 21.
Explore the numbers you can make using six beads.
First I drew some abacus on a piece of paper.
Next I drew the beads and wrote the number it made underneath.
I started with no beads on the Tens column and then increased it by one each time and at the same take taking one bead off the units column each time.
I got seven numbers. They were 6,15,24,33,42,51 and 60.