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Verified answer
Bab Pola BilanganMatematika SMP Kelas VII
-1 + 2 - 3 + 4 - 5 + ..... -99 + 100 = (-1 + 2) + (-3 + 4) + ... + (-99 + 100)
= -1 - 1 - 1 ........ -1 → sebanyak 50
= -1 x 50
= -50