1. Cat consuma o oaie in 4 zile 3x4=12 kg 2. Cat consuma o vaca in 4 zile ? 9x4=36 kg 3. Cat consuma 13 oi in 4 zile ? 12x13=156 kg 4. Cat consuma 17 vaci in 4 zile ? 17x36=612 kg 5. Cat consuma 13 oi si 17 vazi in patru zile ? 612+156=768 kg
13 * 3 = 39 kg/zi oile 39 * 4 = 156 kg oile in 4 zile 17 * 9 = 153 kg/zi vacile 153 * 4 = 612 kg vacile in 4 zile 156 + 612 = 768 kg in 4 zile, 13 oi si 17 vaci
