Abacus beads calculation tool instrument.
Schlüsselwörter
abacus,
bead,
calculation,
tool,
instrument,
counting,
mathematic,
arithmetic,
education,
learning,
number,
calculate,
compute,
summing,
subtract,
multiply,
divide,
old school,
traditional,
school,
student,
teacher,
classroom,
training,
practice,
skill,
dexterity,
logic,
problem,
solving,
strategy,
thinking,
trainer,
manual,
wooden,
frame,
row,
column,
wire,
rod,
count,
educational,
resource,
toy,
recreation,
mental,
exercise,
puzzle
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