1. \(31460 + 1040 = 32500\)
2. \(2400 : 120 = 20\)
3. \(150 - 20 = 130\)
4. \(32500 : 130 = 250\)
5. \(250 \times 20 = 5000\)
6. \(5000 : 125 = 40\)
7. \(40 + 100 = 140\)
1. \(78213 - 75209 = 3004\)
2. \(3004 \times 207 = 621828\)
3. \(315123 - 314716 = 407\)
4. \(407 \times 308 = 125356\)
5. \(621828 - 125356 = 496472\)
1. \(71370 : 234 = 305\)
2. \(305 \times 234 = 71370\)
3. \(695 \times 50 = 34750\)
4. \(280084 : 28 = 10003\)
5. \(71370 + 34750 = 106120\)
6. \(106120 - 10003 = 96117\)
1. \(970710 : 1235 = 786\)
2. \(408 \times 2700 = 1101600\)
3. \(2786 - 786 = 2000\)
4. \(2000 + 1101600 = 1103600\)
Ответ: 140; 496472; 96117; 1103600.