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Mathemathic Trick
RIZKI AGNESTRIA (110210204036)
• 18² - 15² = ?
18 + 15 = 33
18 - 15 = 3
• Jadi = 33x3 = 99
• Mengurangi dari 1.000
1000 - 648 = ?
Tahap 1: kurangi 6 dari 9 = 3
Tahap 2: kurangi 4 dari 9 = 5
Tahap 3: kurangi 8 dari 10 = 2
• Jawaban: 352
• Bilangan 987654321 dikali sembilan bilangan asli
kelipatan 9 yang pertama :
• 987654321 x 9 = 8.888.888.889
• 987654321 x 18 = 17.777.777.778
• 987654321 x 27 = 26.666.666.667
• 987654321 x 36 = 35.555.555.556
• 987654321 x 45 = 44.444.444.445
• 987654321 x 54 = 53.333.333.334
• 987654321 x 63 = 62.222.222.223
• 987654321 x 72 = 71.111.111.112
• 987654321 x 81 = 80.000.000.001
Mathemathic Black Hole

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Rizki agnestria (75)

  • 1. Mathemathic Trick RIZKI AGNESTRIA (110210204036) • 18² - 15² = ? 18 + 15 = 33 18 - 15 = 3 • Jadi = 33x3 = 99 • Mengurangi dari 1.000 1000 - 648 = ? Tahap 1: kurangi 6 dari 9 = 3 Tahap 2: kurangi 4 dari 9 = 5 Tahap 3: kurangi 8 dari 10 = 2 • Jawaban: 352
  • 2. • Bilangan 987654321 dikali sembilan bilangan asli kelipatan 9 yang pertama : • 987654321 x 9 = 8.888.888.889 • 987654321 x 18 = 17.777.777.778 • 987654321 x 27 = 26.666.666.667 • 987654321 x 36 = 35.555.555.556 • 987654321 x 45 = 44.444.444.445 • 987654321 x 54 = 53.333.333.334 • 987654321 x 63 = 62.222.222.223 • 987654321 x 72 = 71.111.111.112 • 987654321 x 81 = 80.000.000.001 Mathemathic Black Hole