: Commas before a picture mean remove the first letter; commas after mean remove the last. 2. Thematic Math Crosswords (Krossvordy)
: Instead of text clues, kids see an image (like a clock) and must write the term (like "Время"). 3. Mathematical Charades (Sharady)
Rebuses use pictures and symbols (commas for removing letters, signs for replacement) to hide mathematical terms.