Activities/Abacus: Difference between revisions
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File:Abacus-plus-19.png|+19 (20-1=19) | File:Abacus-plus-19.png|+19 (20-1=19) | ||
File:Abacus-plus-24.png|+24 | File:Abacus-plus-24.png|+24 | ||
File:Abacus-55 | File:Abacus-55.png|4+3+5+19+24=55 | ||
</gallery> | </gallery> | ||