Pertanyaan

7 1 × 13 3 − 13 3 × 21 1 = ....

$\frac{1}{7} \times \frac{3}{13} - \frac{3}{13} \times \frac{1}{21} =$ ....

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I. Sutiawan

Master Teacher

Mahasiswa/Alumni Universitas Pasundan

Jawaban terverifikasi

Pembahasan

Berdasarkan sifat-sifat pada operasi hitung pecahan, maka

$begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 1 over 7 cross times 3 over 13 minus 3 over 13 cross times 1 over 21 end cell equals cell 3 over 13 cross times 1 over 7 minus 3 over 13 cross times 1 over 21 end cell row blank equals cell 3 over 13 cross times open parentheses 1 over 7 minus 1 over 21 close parentheses end cell row blank equals cell 3 over 13 cross times open parentheses 1 over 7 cross times 3 over 3 minus 1 over 21 close parentheses end cell row blank equals cell 3 over 13 cross times open parentheses 3 over 21 minus 1 over 21 close parentheses end cell row blank equals cell 3 over 13 cross times 2 over 21 end cell row blank equals cell fraction numerator 3 cross times 2 over denominator 13 cross times 21 end fraction end cell row blank equals cell fraction numerator 3 cross times 2 over denominator 13 cross times open parentheses 3 cross times 7 close parentheses end fraction end cell row blank equals cell fraction numerator 2 over denominator 13 cross times 7 end fraction end cell row blank equals cell 2 over 91 end cell end table end style$