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13. Hitungkan: \( 3 / 7 \div 2 / 5-1 / 3 \)

Ask by Stewart Wood. in Malaysia
Mar 19,2025

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Jawapan ialah \( \frac{31}{42} \).

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The Deep Dive

Mari kita hitung langkah demi langkah! Pertama, kita ubah pembagian menjadi perkalian dengan membalik pecahan kedua. Jadi, \( 3 / 7 \div 2 / 5 \) menjadi \( 3 / 7 \times 5 / 2 \). Menyederhanakan itu, kita dapat \( 15 / 14 \). Sekarang kita kurangi \( 1 / 3 \) dari \( 15 / 14 \). Untuk mengurangkan pecahan, kita perlukan penyebut yang sama, yaitu 42. Jadi, kita ubah kedua pecahan: \( 15 / 14 = 45 / 42 \) dan \( 1 / 3 = 14 / 42 \). Sekarang kita kurangi: \( 45 / 42 - 14 / 42 = 31 / 42 \). Jadi, hasil akhirnya adalah \( 31 / 42 \).

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