Question

Вычисли удобным способом: 389-(57+189)= (416+198)-116= (213+189)-89= 1277+(342+23)= 2387-(387+1455)= (467+295)+33= 479-(27+179)= (519+192)-119= (143+384)-84= 1262+(342+38)= 2781-(781+1425)= (492+295)+8= (96+336)-86= 96-(36+46)= 88-(18+33)= 115-(75+18)= (457+33)-57= (629+84)-74=

Answer 1

Ответ:

а)(389-189)-57=143

б)(416-116)+198=398

в)(189-89)+213=313

г)(2387-387)+1455=3455

д)(467+33)+295=795

Answer 2

Давайте рассчитаем эти выражения:

1. 389 - (57 + 189) = 389 - 246 = 143
2. (416 + 198) - 116 = 614 - 116 = 498
3. (213 + 189) - 89 = 402 - 89 = 313
4. 1277 + (342 + 23) = 1277 + 365 = 1642
5. 2387 - (387 + 1455) = 2387 - 1842 = 545
6. (467 + 295) + 33 = 762 + 33 = 795
7. 479 - (27 + 179) = 479 - 206 = 273
8. (519 + 192) - 119 = 711 - 119 = 592
9. (143 + 384) - 84 = 527 - 84 = 443
10. 1262 + (342 + 38) = 1262 + 380 = 1642
11. 2781 - (781 + 1425) = 2781 - 2206 = 575
12. (492 + 295) + 8 = 787 + 8 = 795
13. (96 + 336) - 86 = 432 - 86 = 346
14. 96 - (36 + 46) = 96 - 82 = 14
15. 88 - (18 + 33) = 88 - 51 = 37
16. 115 - (75 + 18) = 115 - 93 = 22
17. (457 + 33) - 57 = 490 - 57 = 433
18. (629 + 84) - 74 = 713 - 74 = 639

Вот ответы на все задачи.