• Menggunakan cara yg runtut!!! • Terima kasih Rata-rata nilai ulangan Matematika 16 siswa kelas VI adalah 82,75. Setelah Nana dan Dewa mengikuti ulangan susulan, rata-rata nilai menjadi 81,5. Nilai Nana 2 kurangnya dari nilai Dewa. Nilai Nana dan Dewa berturut-turut adalah....

<p>Jawab :</p><p>Jumlah nilai Nana dan Dewa = (81,5 × 18) - (82,75&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; × 16)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 1467 - 1324</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 143</p><p>Nilai Nana = (143 - 2) : 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 141 : 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 70,5</p><p>Nilai Dewa = 70,5 + 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 72,5</p><p><strong>Jadi, nilai Nana dan Dewa berturut - turut adalah </strong><i><strong>70,5 dan 72,5</strong></i></p>