De la Coma a la Fracción: Visualizando el Valor Posicional

Section role: supports the formalization section while the teacher explains the place value system and connects graphical representations to decimal notation on the board. Slides: (1) Title — 'Conectando Comas y Fracciones'; (2) La Unidad Completa — bullets: visual of a full grid representing 1 entero, definition of the base unit; (3) Décimos — bullets: grid divided into 10 equal parts, 1/10 as a fraction, 0,1 as a decimal; (4) Centésimos — bullets: grid divided into 100 parts, 1/100 as a fraction, 0,01 as a decimal; (5) Comparación Directa — bullets: visual contrast between $120,5 y $120,05 using grid models to show why trailing zeros matter; (6) Fracciones Decimales — bullets: definition of denominators 10, 100 y 1000, conversion examples; (7) Milésimos — bullets: brief introduction to 1/1000 and 0,001; (8) Práctica Rápida — bullets: interactive prompt to read 0,35 as treinta y cinco centésimos; Closing slide: '¿Cómo se escribe en fracción el número que usamos antes en el precio del pan?' — hands control back to the teacher for the individual practice session.

Lara de Teachy