1267 Найдите a) 56-29 +23-27; б) 165 + 308 - 75 - 153; в) 34⋅35: 85⋅3; г) 1088: 136⋅25:20: д) 11⋅45-224:14-336⋅8 е) 442:34⋅60-256⋅9:96 1268 Вычислите: a) 465 : (141 + 14⋅22-11⋅38) +594 : 33; б) (17⋅9-403:31)⋅ (1598:47 - 24); в) (110 + 17⋅6)⋅ 240 : (400 - 5⋅64); г) (54 + 1112⋅139)⋅31 - 46; д) 8607 + 7605 + (376012-83314): 414:7; е) (5980 + 6620): 28: (5⋅3+15⋅29).

Выполним вычисления по действиям. 267. Найдите a) 56 - 29 + 23 - 27 1. 56 - 29 = 27 2. 27 + 23 = 50 3. 50 - 27 = 23 Ответ: 23 б) 165 + 308 - 75 - 153 1. 165 + 308 = 473 2. 473 - 75 = 398 3. 398 - 153 = 245 Ответ: 245 в) 34 \cdot 35 \div 85 \cdot 3 1. $$34 \cdot 35 = 1190$$ 2. $$1190 \div 85 = 14$$ 3. $$14 \cdot 3 = 42$$ Ответ: 42 г) 1088 \div 136 \cdot 25 \div 20 1. $$1088 \div 136 = 8$$ 2. $$8 \cdot 25 = 200$$ 3. $$200 \div 20 = 10$$ Ответ: 10 д) 11 \cdot 45 - 224 \div 14 - 336 \cdot 8 1. $$11 \cdot 45 = 495$$ 2. $$224 \div 14 = 16$$ 3. $$336 \cdot 8 = 2688$$ 4. $$495 - 16 = 479$$ 5. $$479 - 2688 = -2209$$ Ответ: -2209 е) 442 \div 34 \cdot 60 - 256 \cdot 9 \div 96 1. $$442 \div 34 = 13$$ 2. $$13 \cdot 60 = 780$$ 3. $$256 \cdot 9 = 2304$$ 4. $$2304 \div 96 = 24$$ 5. $$780 - 24 = 756$$ Ответ: 756 1268. Вычислите: а) 465 \div (141 + 14 \cdot 22 - 11 \cdot 38) + 594 \div 33 1. $$14 \cdot 22 = 308$$ 2. $$11 \cdot 38 = 418$$ 3. $$141 + 308 = 449$$ 4. $$449 - 418 = 31$$ 5. $$465 \div 31 = 15$$ 6. $$594 \div 33 = 18$$ 7. $$15 + 18 = 33$$ Ответ: 33 б) (17 \cdot 9 - 403 \div 31) \cdot (1598 \div 47 - 24) 1. $$17 \cdot 9 = 153$$ 2. $$403 \div 31 = 13$$ 3. $$153 - 13 = 140$$ 4. $$1598 \div 47 = 34$$ 5. $$34 - 24 = 10$$ 6. $$140 \cdot 10 = 1400$$ Ответ: 1400 в) (110 + 17 \cdot 6) \cdot 240 \div (400 - 5 \cdot 64) 1. $$17 \cdot 6 = 102$$ 2. $$110 + 102 = 212$$ 3. $$212 \cdot 240 = 50880$$ 4. $$5 \cdot 64 = 320$$ 5. $$400 - 320 = 80$$ 6. $$50880 \div 80 = 636$$ Ответ: 636 г) (54 + 1112 \cdot 139) \cdot 31 - 46 1. $$1112 \cdot 139 = 154568$$ 2. $$54 + 154568 = 154622$$ 3. $$154622 \cdot 31 = 4793282$$ 4. $$4793282 - 46 = 4793236$$ Ответ: 4793236 д) 8607 + 7605 + (376012 - 83314) \div 414 \div 7 1. $$376012 - 83314 = 292698$$ 2. $$292698 \div 414 = 707$$ 3. $$707 \div 7 = 101$$ 4. $$8607 + 7605 = 16212$$ 5. $$16212 + 101 = 16313$$ Ответ: 16313 е) (5980 + 6620) \div 28 \div (5 \cdot 3 + 15 \cdot 29) 1. $$5980 + 6620 = 12600$$ 2. $$12600 \div 28 = 450$$ 3. $$5 \cdot 3 = 15$$ 4. $$15 \cdot 29 = 435$$ 5. $$15 + 435 = 450$$ 6. $$450 \div 450 = 1$$ Ответ: 1