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A. 4 + (-9) + 16 = 4 - 9 + 16 = 11
B. 14 + (-10) + (-26) = 14 - 10 - 26 = -30
C. -11 + (-17) + 46 = -11 - 17 + 46 = 18
D. -28 + (-18) + (-31) = -(28 + 18 + 31) = -77
Nomer 3
Jumlah nilai = -70 + 90 + (-30) + 40 + (-50)
= -70 + 90 - 30 + 40 - 50
= -20
Nomer 4
Nilai benar = 2, nilai salah = -1, tidak dijawab = 0
Banyak soal = 100
Benar = 76
Tidak terjawab = 5
Salah = 100 - 76 - 5 = 19
Jadi, nilai yang didapat,
N = (76 · 2) + (19 · (-1)) + (5 · 0)
= 152 - 19 + 0
= 133
Nilai akhir = 133
Terimaasih semoga membantu