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Library / Mathematics / 1001 tasks for mental calculation / Braille

1001 tasks for mental calculation ⠃⠗⠋ braille edition

Grade 1 — uncontracted, letter-for-letter. Translated on this server by our own braille engine (BRF — Braille Ready Format, Library of Congress fdd000551). View Grade 2 instead.

Download .brf — Grade 2 Download .brf — Grade 1 Plain-text reader .txt

54,919 braille cells · 55 embossed pages at 40×25 · 102,116 unrepresentable characters omitted

⠲⠀⠀⠀⠀⠀⠼⠉⠚⠀⠲⠀⠀⠦⠀⠀⠀⠀⠀⠼⠓⠁⠲⠀⠀⠀⠀⠀⠀⠼⠃⠙⠀⠀⠀⠼⠛⠑⠀⠲
⠀⠀⠲⠀⠀⠀⠀⠼⠙⠚⠀⠀⠀⠼⠋⠚⠀⠲⠀⠀⠂⠀⠀⠀⠀⠀⠀⠼⠛⠚⠀⠀⠲⠀⠀⠀⠀⠦⠀
⠼⠁⠃⠚⠀⠲⠀⠀⠀⠀⠼⠓⠃⠲⠀⠀⠀⠀⠀⠀⠀⠼⠉⠛⠃⠀⠀⠀⠼⠃⠃⠑⠀⠲⠀⠀⠀⠀⠀
⠼⠁⠃⠀⠀⠲⠀⠀⠀⠀⠀⠀⠂⠀⠀⠀⠀⠼⠃⠛⠀⠲⠀⠦⠀⠀⠼⠛⠚⠀⠲⠀⠀⠀⠀⠼⠓⠉⠲⠀
⠼⠛⠑⠀⠲⠂⠀⠀⠀⠀⠀⠀⠀⠀⠼⠃⠚⠀⠲⠀⠀⠀⠀⠀⠀⠦⠀⠼⠁⠙⠚⠀⠲⠀⠀⠀⠀
⠼⠓⠙⠲⠀⠀⠀⠀⠀⠀⠀⠼⠁⠁⠚⠚⠀⠲⠂⠀⠀⠀⠀⠀⠀⠀⠼⠙⠀⠲⠀⠀⠀⠀⠀⠀⠦⠀
⠼⠉⠚⠀⠲⠀⠀⠀⠀⠼⠓⠑⠲⠀⠀⠀⠀⠀⠀⠼⠛⠀⠲⠀⠼⠋⠓⠀⠲⠀⠲⠀⠀⠀⠀⠀⠀⠼⠁⠀
⠲⠀⠼⠃⠚⠀⠲⠂⠀⠀⠀⠀⠀⠼⠁⠑⠀⠲⠀⠀⠀⠀⠀⠀⠀⠦⠀⠀⠀⠀⠀⠼⠓⠋⠲⠀⠀⠀⠀
⠼⠛⠛⠀⠀⠀⠼⠁⠉⠀⠲⠀⠀⠀⠼⠃⠛⠀⠂⠀⠀⠀⠀⠀⠀⠼⠉⠛⠀⠲⠀⠀⠦⠀⠼⠃⠀⠲⠀⠀
⠼⠓⠛⠲⠀⠀⠼⠓⠚⠀⠀⠀⠀⠼⠃⠑⠀⠲⠀⠀⠀⠀⠼⠃⠊⠀⠂⠀⠀⠀⠀⠀⠼⠋⠊⠀⠲⠀⠀⠦
⠀⠼⠁⠀⠲⠀⠀⠀⠀⠼⠓⠓⠲⠀⠀⠀⠀⠀⠀⠼⠃⠙⠀⠲⠀⠀⠀⠀⠀⠼⠑⠚⠀⠲⠆⠀⠀⠀⠀⠀
⠼⠓⠚⠀⠲⠀⠀⠀⠀⠀⠼⠃⠀⠲⠀⠼⠁⠚⠀⠲⠀⠀⠦⠀⠀⠀⠀⠀⠀⠼⠓⠊⠲⠀⠀⠀⠀⠀⠀
⠼⠛⠑⠀⠀⠀⠼⠃⠚⠚⠀⠲⠀⠀⠀⠀⠀⠀⠀⠼⠉⠀⠲⠀⠀⠀⠀⠀⠀⠀⠼⠙⠚⠀⠀⠀⠼⠃⠑⠚
⠀⠲⠀⠀⠀⠀⠀⠀⠀⠀⠲⠀⠀⠦⠀⠼⠁⠑⠀⠲⠀⠀⠀⠀⠼⠊⠚⠲⠀⠀⠀⠼⠊⠀⠀⠀⠀⠀⠲⠀
⠼⠁⠀⠲⠀⠀⠀⠀⠀⠼⠃⠚⠀⠀⠀⠀⠼⠙⠀⠲⠀⠀⠀⠀⠀⠼⠉⠚⠀⠲⠀⠀⠀⠦⠀⠼⠁⠙⠀⠲
⠀⠀⠀⠀⠀⠼⠊⠁⠲⠀⠀⠀⠼⠁⠓⠀⠀⠀⠂⠀⠀⠀⠀⠼⠃⠁⠓⠓⠆⠀⠀⠲⠀⠀⠀⠦⠀⠼⠓⠀
⠼⠊⠃⠲⠀⠀⠀⠼⠓⠚⠀⠂⠀⠀⠀⠀⠲⠀⠀⠀⠼⠃⠚⠚⠚⠀⠦⠀⠀⠼⠃⠑⠀⠲⠀⠀⠀⠀
⠼⠊⠉⠲⠀⠀⠀⠀⠲⠀⠀⠀⠀⠀⠀⠀⠲⠂⠀⠀⠀⠀⠀⠼⠃⠙⠀⠲⠀⠲⠀⠀⠀⠀⠀⠀⠀⠼⠉⠀
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⠼⠊⠙⠲⠀⠀⠀⠀⠀⠀⠲⠀⠀⠀⠀⠀⠀⠼⠛⠀⠂⠀⠀⠼⠓⠀⠀⠀⠆⠀⠀⠀⠀⠀⠀⠼⠊⠀⠀⠂
⠀⠀⠀⠼⠙⠀⠀⠲⠀⠀⠀⠀⠂⠀⠀⠀⠀⠀⠀⠀⠀⠦⠀⠼⠑⠚⠆⠀⠼⠋⠀⠀⠀⠀⠼⠊⠑⠲⠀⠀
⠼⠋⠚⠚⠀⠲⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠼⠁⠑⠀⠀⠀⠼⠃⠙⠚⠀⠀⠀⠀⠀⠀⠲⠀⠀⠀⠀
⠦⠀⠼⠁⠋⠆⠀⠼⠃⠙⠀⠀⠀⠀⠼⠊⠋⠲⠀⠀⠀⠀⠀⠀⠀⠼⠉⠃⠚⠀⠲⠀⠀⠀⠀⠀⠀⠀⠂⠀
⠲⠀⠀⠀⠀⠀⠀⠦⠀⠼⠋⠚⠀⠲⠆⠀⠼⠃⠋⠚⠀⠲⠀⠀⠀⠀⠼⠊⠛⠲⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠼⠃⠑⠀⠂⠀⠀⠀⠀⠀⠼⠑⠀⠀⠀⠲⠀⠀⠀⠀⠀⠀⠀⠀⠼⠃⠚⠀⠀⠀⠀⠀⠀⠀⠲⠀⠀⠀⠀⠀

These are the same pages the .brf download embosses — form-feed breaks and all. BRF opens in braille software (Duxbury, BrailleBlaster), on embossers, and on refreshable displays.