Ответ:
- \(318 \cdot 78 + 318 \cdot 22 = 318 \cdot (78 + 22) = 318 \cdot 100 = 31800\).
- \(856 \cdot 92 - 853 \cdot 92 = (856 - 853) \cdot 92 = 3 \cdot 92 = 276\).
- \(943 \cdot 268 + 943 \cdot 232 = 943 \cdot (268 + 232) = 943 \cdot 500 = 471500\).
- \(65 \cdot 246 - 65 \cdot 229 - 65 \cdot 17 = 65 \cdot (246 - 229 - 17) = 65 \cdot 0 = 0\).
Ответ: 1) 31800; 2) 276; 3) 471500; 4) 0.
