Вычисли удобным способом.

Для решения удобным способом объединяем числа в группы, дающие в результате «круглые» значения (десятки или сотни). **Столбец 1** 774 + 52 + 26 + 48 = (774 + 26) + (52 + 48) = 800 + 100 = 900 112 + 506 + 94 + 88 = (112 + 88) + (506 + 94) = 200 + 600 = 800 75 + 237 + 325 + 163 = (75 + 325) + (237 + 163) = 400 + 400 = 800 304 + 212 + 108 + 96 = (304 + 96) + (212 + 108) = 400 + 320 = 720 528 + 93 + 172 + 107 = (528 + 172) + (93 + 107) = 700 + 200 = 900 34 + 146 + 266 + 54 = (34 + 266) + (146 + 54) = 300 + 200 = 500 148 + 330 + 170 + 52 = (148 + 52) + (330 + 170) = 200 + 500 = 700 43 + 54 + 65 + 76 + 27 = (43 + 27) + (54 + 76) + 65 = 70 + 130 + 65 = 265 357 + 28 + 112 + 43 = (357 + 43) + (28 + 112) = 400 + 140 = 540 62 + 43 + 828 + 57 = (62 + 828) + (43 + 57) = 890 + 100 = 990 136 + 61 + 129 + 264 = (136 + 264) + (61 + 129) = 400 + 190 = 590 260 + 220 + 480 = 960 466 + 380 + 120 + 34 = (466 + 34) + (380 + 120) = 500 + 500 = 1000 154 + 218 + 326 + 2 = (154 + 326) + (218 + 2) = 480 + 220 = 700 427 + 16 + 373 + 184 = (427 + 373) + (16 + 184) = 800 + 200 = 1000 297 + 549 + 103 = (297 + 103) + 549 = 400 + 549 = 949 616 + 298 + 84 = (616 + 84) + 298 = 700 + 298 = 998 272 - 99 - 172 = (272 - 172) - 99 = 100 - 99 = 1 705 - 217 - 305 = (705 - 305) - 217 = 400 - 217 = 183 314 + 150 + 536 = (314 + 536) + 150 = 850 + 150 = 1000 253 + 247 + 395 = (253 + 247) + 395 = 500 + 395 = 895 576 + 49 + 124 + 31 = (576 + 124) + (49 + 31) = 700 + 80 = 780 355 + 165 + 145 + 15 = (355 + 145) + (165 + 15) = 500 + 180 = 680 425 + 412 + 75 = (425 + 75) + 412 = 500 + 412 = 912 712 - 270 - 312 = (712 - 312) - 270 = 400 - 270 = 130 89 + 211 + 617 = (89 + 211) + 617 = 300 + 617 = 917 963 - 540 - 163 = (963 - 163) - 540 = 800 - 540 = 260 216 + 215 + 254 = (216 + 254) + 215 = 470 + 215 = 685 771 - 205 - 131 = 435 687 + 23 + 113 = (687 + 113) + 23 = 800 + 23 = 823 256 + 71 + 129 + 344 = (256 + 344) + (71 + 129) = 600 + 200 = 800 507 - 102 - 207 = (507 - 207) - 102 = 300 - 102 = 198 308 + 112 + 408 + 92 = (308 + 408) + (112 + 92) = 716 + 204 = 920 611 - 79 - 211 - 29 = (611 - 211) - (79 + 29) = 400 - 108 = 292 473 + 125 + 127 + 175 = (473 + 127) + (125 + 175) = 600 + 300 = 900 876 - 111 - 165 = 600 143 + 157 + 265 + 125 = (143 + 157) + (265 + 125) = 300 + 390 = 690 897 - 315 - 297 = (897 - 297) - 315 = 600 - 315 = 285 324 + 239 + 176 + 61 = (324 + 176) + (239 + 61) = 500 + 300 = 800 **Столбец 2** 4 × 7 × 25 = (4 × 25) × 7 = 100 × 7 = 700 5 × 18 × 2 = (5 × 2) × 18 = 10 × 18 = 180 25 × 2 × 4 = 25 × (2 × 4) = 25 × 8 = 200 25 × 7 × 4 × 1 = (25 × 4) × 7 = 100 × 7 = 700 8 × 9 × 5 × 2 = (8 × 9) × (5 × 2) = 72 × 10 = 720 5 × 7 × 4 × 5 = (5 × 4) × (7 × 5) = 20 × 35 = 700 7 × 2 × 6 × 5 = 7 × (2 × 5) × 6 = 7 × 10 × 6 = 420 3 × 4 × 25 × 3 = (4 × 25) × (3 × 3) = 100 × 9 = 900 9 × 5 × 3 × 4 = (5 × 4) × (9 × 3) = 20 × 27 = 540 7 × 5 × 7 × 2 = (5 × 2) × (7 × 7) = 10 × 49 = 490 11 × 10 × 2 = 11 × 20 = 220 2 × 17 × 4 × 5 = (2 × 5) × (17 × 4) = 10 × 68 = 680 5 × 29 × 2 × 2 = (5 × 2) × 29 × 2 = 10 × 58 = 580 6 × 4 × 5 × 3 = (4 × 5) × (6 × 3) = 20 × 18 = 360 9 × 2 × 6 × 5 = (2 × 5) × (9 × 6) = 10 × 54 = 540 2 × 7 × 5 × 5 = (2 × 5) × (7 × 5) = 10 × 35 = 350 3 × 5 × 9 × 4 = (5 × 4) × (3 × 9) = 20 × 27 = 540 8 × 4 × 15 × 2 = (8 × 15) × (4 × 2) = 120 × 8 = 960 9 × 6 × 5 × 3 = (6 × 5) × (9 × 3) = 30 × 27 = 810 25 × 7 × 4 = (25 × 4) × 7 = 700 10 × 4 × 7 × 3 = 10 × (4 × 7 × 3) = 840 20 × 8 × 5 = (20 × 5) × 8 = 100 × 8 = 800 45 × 6 × 2 = 45 × 12 = 540 6 × 3 × 50 = (6 × 3) × 50 = 18 × 50 = 900 5 × 2 × 2 × 7 × 5 = (5 × 2) × (2 × 5) × 7 = 10 × 10 × 7 = 700 8 × 4 × 5 = 8 × 20 = 160 12 × 7 × 5 = 12 × 35 = 420 4 × 4 × 50 = 4 × 200 = 800 2 × 28 × 5 = (2 × 5) × 28 = 280 6 × 7 × 15 = 42 × 15 = 630 2 × 8 × 45 = 16 × 45 = 720 (здесь ошибка в тексте, должно быть 16*45=720, но пересчитаем: 2*8*45=180? Нет, 16*45 = 720) 4 × 3 × 5 × 2 = (4 × 5) × (3 × 2) = 20 × 6 = 120 9 × 25 × 3 = 25 × 27 = 675 10 × 4 × 11 = 40 × 11 = 440 4 × 16 × 10 = 64 × 10 = 640 2 × 9 × 15 = (2 × 15) × 9 = 30 × 9 = 270 50 × 4 × 2 = (50 × 2) × 4 = 400 20 × 7 × 5 = (20 × 5) × 7 = 700 2 × 50 × 7 = (2 × 50) × 7 = 700 **Столбец 3** 16 × 4 × 5 - 200 = 16 × 20 - 200 = 320 - 200 = 120 2 × 9 × 50 - 450 = (2 × 50) × 9 - 450 = 900 - 450 = 450 25 × 7 × 4 + 300 = (25 × 4) × 7 + 300 = 1000 4 × 9 × 15 - 240 = (4 × 15) × 9 - 240 = 60 × 9 - 240 = 540 - 240 = 300 7 × 47 + 7 × 53 = 7 × (47 + 53) = 7 × 100 = 700 46 × 12 + 8 × 46 = 46 × (12 + 8) = 46 × 20 = 920 89 × 87 - 89 × 77 = 89 × (87 - 77) = 89 × 10 = 890 60 × 91 - 50 × 91 = 91 × (60 - 50) = 91 × 10 = 910 54 × 49 - 49 × 53 = 49 × (54 - 53) = 49 34 × 31 - 34 × 11 = 34 × (31 - 11) = 34 × 20 = 680 135 × 7 + 5 = 945 + 5 = 950 44 × 7 + 26 × 7 = 7 × (44 + 26) = 7 × 70 = 490 67 × 6 - 17 × 6 = 6 × (67 - 17) = 6 × 50 = 300 2 × 43 + 2 × 57 = 2 × (43 + 57) = 2 × 100 = 200 59 × 46 - 44 × 59 = 59 × (46 - 44) = 59 × 2 = 118 2 × 94 + 8 × 94 = 94 × (2 + 8) = 940 67 × 3 - 7 × 3 = 3 × (67 - 7) = 3 × 60 = 180 327 + 420 - 127 = (327 - 127) + 420 = 200 + 420 = 620 415 + 75 + 210 = 490 + 210 = 700 6 × 32 + 6 × 68 = 6 × (32 + 68) = 6 × 100 = 600 49 × 15 + 49 × 5 = 49 × (15 + 5) = 49 × 20 = 980 57 × 39 - 57 × 38 = 57 × (39 - 38) = 57 96 × 95 - 94 × 95 = 95 × (96 - 94) = 95 × 2 = 190 62 × 76 - 76 × 52 = 76 × (62 - 52) = 76 × 10 = 760 9 × 58 + 58 = 58 × (9 + 1) = 580 8 × 41 - 8 = 8 × (41 - 1) = 8 × 40 = 320 2 × 62 + 38 × 2 = 2 × (62 + 38) = 2 × 100 = 200 812 - (68 + 612) = 812 - 680 = 132 69 × 3 + 69 × 7 = 69 × (3 + 7) = 690 47 × 6 - 47 × 5 = 47 × (6 - 5) = 47 2 × 79 + 8 × 79 = 79 × (2 + 8) = 790 67 × 3 - 7 × 3 = 180 687 - (135 + 187) = 687 - 322 = 365 51 × 4 + 51 × 6 = 51 × (4 + 6) = 510 373 + 289 - 73 = (373 - 73) + 289 = 300 + 289 = 589 62 × 8 - 2 × 8 = 8 × (62 - 2) = 8 × 60 = 480 959 - (150 + 359) = 959 - 509 = 450 378 + 569 - 168 = (378 - 168) + 569 = 210 + 569 = 779 6 × 15 × 9 = 90 × 9 = 810