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Pelajaran SMPLangsung Cara.......
100 : 2 = 50 (Ganjil/Genap)
50 : 2 = 25 pasang
A) 2 + 4 + 6 + 8 + 10 +...+ 100
102 x 25 = 2.550
B) Bedakan Positif Dengan Negatif
Positif (Genap)
2 + 4 + 6 + 8 +...+ 100
= 100 x 2 = 102 x 25 = 2.550
Negatif (Ganjil)
-1 + -3 + -5 + -7 +...+ -99
= -99 + -1 = -100 x 25 = -2.500
C) -99 sampai 99 sudh terpakai
Jadi sisanya = -100
Jadi hasilnya = -100
Semoga membantu......
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