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4. Vervang die \( \square \) met die korrekte ve a) \( \frac{3}{4} \square \frac{11}{16} \) b) \( \frac{3}{7} \square \frac{3}{5} \)

Ask by Pritchard Ruiz. in South Africa
Feb 25,2025

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a) \( \frac{3}{4} \times \frac{11}{16} \) b) \( \frac{3}{7} + \frac{3}{5} \)

Solution

Om die ontbrekende operasies in die uitdrukkings te vervang, moet ons die breuke met mekaar vergelyk en die toepaslike operasie (optelling, aftrekking, vermenigvuldiging of deling) vind. ### a) \( \frac{3}{4} \square \frac{11}{16} \) 1. **Vermenigvuldiging**: \[ \frac{3}{4} \times \frac{11}{16} = \frac{3 \times 11}{4 \times 16} = \frac{33}{64} \] 2. **Optelling**: \[ \frac{3}{4} + \frac{11}{16} = \frac{3 \times 4}{4 \times 4} + \frac{11}{16} = \frac{12}{16} + \frac{11}{16} = \frac{23}{16} \] 3. **Aftrekking**: \[ \frac{3}{4} - \frac{11}{16} = \frac{3 \times 4}{4 \times 4} - \frac{11}{16} = \frac{12}{16} - \frac{11}{16} = \frac{1}{16} \] 4. **Delings**: \[ \frac{3}{4} \div \frac{11}{16} = \frac{3}{4} \times \frac{16}{11} = \frac{3 \times 16}{4 \times 11} = \frac{48}{44} = \frac{12}{11} \] Die korrekte operasie hang af van die konteks. As ons die grootste waarde wil hê, kan ons sê dat die beste operasie hier **vermenigvuldiging** is. ### b) \( \frac{3}{7} \square \frac{3}{5} \) 1. **Vermenigvuldiging**: \[ \frac{3}{7} \times \frac{3}{5} = \frac{3 \times 3}{7 \times 5} = \frac{9}{35} \] 2. **Optelling**: \[ \frac{3}{7} + \frac{3}{5} = \frac{3 \times 5}{7 \times 5} + \frac{3 \times 7}{5 \times 7} = \frac{15}{35} + \frac{21}{35} = \frac{36}{35} \] 3. **Aftrekking**: \[ \frac{3}{7} - \frac{3}{5} = \frac{3 \times 5}{7 \times 5} - \frac{3 \times 7}{5 \times 7} = \frac{15}{35} - \frac{21}{35} = -\frac{6}{35} \] 4. **Delings**: \[ \frac{3}{7} \div \frac{3}{5} = \frac{3}{7} \times \frac{5}{3} = \frac{3 \times 5}{7 \times 3} = \frac{5}{7} \] Hier kan ons ook sê dat die beste operasie, afhangende van die konteks, **optelling** is, aangesien dit die grootste waarde lewer. ### Samevatting: a) \( \frac{3}{4} \times \frac{11}{16} \) of \( \frac{3}{4} + \frac{11}{16} \) b) \( \frac{3}{7} + \frac{3}{5} \)

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Hou jou hoed vas, want ons gaan 'n wiskundige avontuur op 'n speelse manier maak! a) Om die kolletjies te vervang met die regte operasie, kan ons kyk na die breuke. Die beste keuse hier is om te vermenigvuldig, sodat ons \( \frac{3}{4} \times \frac{11}{16} = \frac{33}{64} \) kry. Dit is lekker eenvoudig! So, die regte operasie is dus \( \times \). b) Voor ons die \(\square\) invul, moet ons kyk na die verhouding van die breuke. Hier sou jy die breuke moet optel om \( \frac{3}{7} + \frac{3}{5} \) te verkry. Dit gee jou 'n lekker uitdaging omdat ons die gemeenskaplike noemer, wat 35 is, moet vind. Die resultante is \( \frac{15}{35} + \frac{21}{35} = \frac{36}{35} \). So, die operasie is dus \( + \).

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