3. Найдите значение суммы и разности натуральных чисел:
- \(225+456-123+114 = 681-123+114 = 558+114 = 672\)
- \(128+1259+123-1456 = 1387+123-1456 = 1510-1456 = 54\)
- \(1237+458+123 = 1695+123 = 1818\)
- \(12789+25789+1289+458+123 = 38578+1289+458+123 = 39867+458+123 = 40325+123 = 40448\)
- \(1278+124+325+12893 = 1402+325+12893 = 1727+12893 = 14620\)
- \(100000-1236-1256-5999+5731 = 98764-1256-5999+5731 = 97508-5999+5731 = 91509+5731 = 97240\)
- \(24589+9537-1235+1259+123 = 34126-1235+1259+123 = 32891+1259+123 = 34150+123 = 34273\)
- \(1278+256+216+31597+1289 = 1534+216+31597+1289 = 1750+31597+1289 = 33347+1289 = 34636\)
- \(987+123+654+197856-9999 = 1110+654+197856-9999 = 1764+197856-9999 = 199620-9999 = 189621\)
- \(159+987654+683-99987 = 987813+683-99987 = 988496-99987 = 888509\)
Ответ: 1) 672, 2) 54, 3) 1818, 4) 40448, 5) 14620, 6) 97240, 7) 34273, 8) 34636, 9) 189621, 10) 888509.