Вопрос:

Вычисли. a) (21 + 8) · 2 + 27 =, б) (5 + 13) · 4 - 22 =, в) 48 : 6 + 54 : 9 =, г) 72 : 9 + 63 : 9 =, д) 69 - 4 · 13 =, е) 18 · 5 - 26 =

Ответ:


а) (21 + 8)2 + 27 = 292 + 27 = 58 + 27 = 85(21 + 8) \(\boldsymbol{\cdot}\) 2 + 27 = 29 \(\boldsymbol{\cdot}\) 2 + 27 = 58 + 27 = 85


б) (5 + 13)4 - 22 = 184 - 22 = 72 - 22 = 50(5 + 13) \(\boldsymbol{\cdot}\) 4 - 22 = 18 \(\boldsymbol{\cdot}\) 4 - 22 = 72 - 22 = 50


в) 486 + 549 = 8 + 6 = 1448 \(\boldsymbol{\cdot}\) 6 + 54 \(\boldsymbol{\cdot}\) 9 = 8 + 6 = 14


г) 729 + 639 = 8 + 7 = 1572 \(\boldsymbol{\cdot}\) 9 + 63 \(\boldsymbol{\cdot}\) 9 = 8 + 7 = 15


д) 69 - 413 = 69 - 52 = 1769 - 4 \(\boldsymbol{\cdot}\) 13 = 69 - 52 = 17


е) 185 - 26 = 90 - 26 = 6418 \(\boldsymbol{\cdot}\) 5 - 26 = 90 - 26 = 64


Похожие