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Pelajaran SMPLangsung Cara.........
100 : 2 = 50 (ganjil/genap banyak angka)
50 : 2 = 25
A) 2 + 4 + 6 + 8 + 10+....+100 = 100 + 2 = 102 x 25 = 2.550
Hasil => 2.550
B) -1+ 2 - 3 + 4 - 5 + 6 - 7 + 8-....+100
Positif (genap)
2 + 4 + 6 + 8+...+100 = 100 + 2 = 102 x 25 = 2.550
Negatif (ganjil)
-1 + -3 + -5 + -7+...+ -99 = -99 + (-1) = -100 x 25 = -2.500
Jadi 2.550 + (-2.500) = 50
C) -100 - 99 - 98-...-2 - 1 - 0 + 1 + 2+...+ 97 + 98 + 99
-99 sampai 99 sudh terpakai
Sisa -100
Jadi Jawabannya ==> -100
Semoga membantu.......
#Maaf jika ada kesalahan.......