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15. 12 kuintal = 120 kg
0,08 ton = 80 kg
• 120 + 80 = 200 kg - 26 kg = 147 kg (B)

16. 2 jam - 1.800 detik - 48 menit
= 120 menit - 30 menit - 48 menit = 42 menit (B)

17. 19 dam² = 1900 m²
216 ca = 216 m²
8 are = 800 m²
384 ca = 384 m²
200 m²
1900 - 800 - 384 - 216 - 200 = 300 m² : 2 = 150 m²