Regras da Adição e Subtração de Frações: Visualizando o Denominador

Section role: supports the 'Sistematizando as Descobertas' section while the teacher formalizes the rules and connects theory to the concrete activities from the previous section. Slides: (1) Title — 'A Regra de Ouro das Frações'; (2) Recalling the Pizza — image of the 8-slice pizza from Section 1, bullets: 2/8 + 3/8, what represents the parts we have; (3) Anatomy of a Fraction — bullets: numerator on top, denominator on the bottom, plain language definitions; (4) Why the Denominator Stays the Same — bullets: visual proof using the paper strips from Section 2, why 6 remains 6; (5) Addition Walkthrough — step-by-step example showing 1/6 + 2/6 = 3/6; (6) Subtraction Walkthrough — step-by-step example showing 5/6 - 2/6 = 3/6; (7) Common Mistake Alert — bullets: why we never add the bottom numbers, comparing 2/8 + 3/8 to 5/16 versus 5/8; Closing slide: 'Prontos para encarar a trilha da Ana?' — sets up the challenge section that follows.

Lara da Teachy