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THE SOLAR SYSTEM
eight planets · size, distance, year and day
Free
NUMBERS 1 TO 100
the hundred chart · primes picked out in colour
Free
MULTIPLICATION TABLE
1 to 12 · colour intensity = size of the product
Free
ROMAN NUMERALS
seven symbols · ones, tens, hundreds · years
$1.50
SI PREFIXES
from quetta to quecto · twenty multipliers
$1.50