Thuc hien phep tinh:
a.3/7.11/15+3/7:15/14+2/7
b.(-7/15).5/8.15/-7(-32)
c.[(1/9:8/27):-1/3]:81/128
d.-66(1/2-1/3+1/11)+124(-37)+63(-124)
C=-66×(1/2-1/3+1/11)+124×-37+63×-124
C=-66×(1/2-1/3+1/11)+124×-37+63×-124
C=-66×(1/2-1/3+1/11)+124×-37+63×-124
C=-66×(1/2-1/3+1/11)+124×-37+63×-124
C=-66×(1/2-1/3+1/11)+124×-37+63×-124
RC=-66×(1/2-1/3+1/11)+124×-37+63×-124
RC=-66×(1/2-1/3+1/11)+124×-37+63×-124
Thực hiện phép tính hợp lý (nếu có thể) :
a) (\(31\dfrac{6}{13}\) + \(5\dfrac{9}{41}\) ) - \(36\dfrac{6}{13}\)
b) \(\dfrac{5}{3}\) +( \(\dfrac{-2}{7}\) ) - (-1,2)
c) 0,25 + \(\dfrac{3}{5}\) - (\(\dfrac{1}{8}\) - \(\dfrac{2}{5}\) + \(1\dfrac{1}{4}\) )