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40 soal
35×4=140 ⇒benar
-2×3=-6 ⇒salah
0×2=0 ⇒tdk dijjawab
140+-6 +0=134
jawaban benar = 35 x 4 = 140:.
jawaban salah = 3 x -2 = - 6
tidak di jawab = 2 x 0 = 0
----------------- +
134 (B)
2.
suhu di permukaan laut = 18⁰
jumlah penurunan suhu = 480/20 = 20 x 1/2⁰ = 10⁰
suhu di ketinggian 480 m = 18⁰ - 10⁰ = 8⁰ (A)