Question

(2/3 + 2 1/5 : 11/20- 4 1/2) . 3² - 1/5​

Answer 1

Răspuns:

(2/3 + 2 1/5 : 11/20- 4 1/2) . 3² - 1/5=

(2/3+21/5×20/11-9/2)×9-1/5=

2/3+21×20/5×11-9/2)×9-1/5=

(2/3+21×4/11-9/2)×9-1/5=

(2/3+84/11-9/2)×9-1/5=

[(22×2+6×84-33×9):66]×9-1/5=

(44+504-297):66×9-1/5=

251×(1/66)×9-1/5=

(251/22)×3-1/5=

753/22-1/5=

(753×5-22)/110=3743/110=

34si3/110