Soal 16. Hitung nilai \( 257 \times 46 \) = \( \ldots \)
| (a) | \( 15.422 \) | (c) | \( 11.822 \) |
| (b) | \( 12.822 \) | (d) | \( 10.822 \) |
Jawaban & Analisis
Kunci: (b) \( 12.822 \)
\( 257 \times 46 = 257 \times (40 + 6) \)
\( = (257 \times 40) + (257 \times 6) \)
\( = 10.280 + 1.542 \)
\( = 12.822 \)
Jadi hasilnya \( 12.822 \), cocok dengan opsi (b).
Soal 17. Hitung nilai \( 37.155 + 25.826 + 11.978 = \ldots \)
| (a) | \( 74.949 \) | (c) | \( 74.959 \) |
| (b) | \( 73.859 \) | (d) | \( 75.959 \) |
Jawaban & Analisis
Kunci: (c) \( 74.959 \)
Jumlahkan bertahap:
\( 37.155 + 25.826 = 62.981 \)
\( 62.981 + 11.978 = 74.959 \)
Jadi hasilnya \( 74.959 \), cocok dengan opsi (c).
Soal 18. Hitung nilai \( 17.226 : 27 = \ldots \)
| (a) | \( 638 \) | (c) | \( 538 \) |
| (b) | \( 518 \) | (d) | \( 718 \) |
Jawaban & Analisis
Kunci: (a) \( 638 \)
Cek dengan perkalian balik:
\( 27 \times 638 = 27 \times (600 + 30 + 8) \)
\( = 16.200 + 810 + 216 \)
\( = 17.226 \)
Karena \( 27 \times 638 = 17.226 \), maka \( 17.226 : 27 = 638 \).
Soal 19. Hitung nilai \( 1000 - 7236 : 9 + 7 \times 80 = \ldots \)
| (a) | \( 560 \) | (c) | \( 764 \) |
| (b) | \( 756 \) | (d) | \( 864 \) |
Jawaban & Analisis
Kunci: (b) \( 756 \)
Dahulukan bagi dan kali:
\( 7236 : 9 = 804 \)
\( 7 \times 80 = 560 \)
Lanjutkan hitung:
\( 1000 - 804 + 560 = 196 + 560 = 756 \)
Soal 20. \( 3 \) minggu \( + \) \( 2 \) bulan \( = \ldots \) hari
| (a) | \( 91 \) | (c) | \( 71 \) |
| (b) | \( 81 \) | (d) | \( 83 \) |
Jawaban & Analisis
Kunci: (b) \( 81 \)
Gunakan konversi: \( 1 \) minggu \( = 7 \) hari, \( 1 \) bulan \( = 30 \) hari.
\( 3 \) minggu \( = 3 \times 7 = 21 \) hari.
\( 2 \) bulan \( = 2 \times 30 = 60 \) hari.
Total: \( 21 + 60 = 81 \)