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Bab Pola BilanganMatematika SMP Kelas VII
(2 + 3 + 3) + 5 + 6 + 7 + ....+100 = ?
1 + 2 + 3 + .... + 100 =
penjumlahan bilangan asli berutan = 1/2 x n x (n + 1)
n = 100
pada kasus ini
jumlah = 1/2 x 100 x (100 + 1) - 2
jumlah = 50 x 101 - 2
jumlah = 5.050 - 2
jumlah = 5.048