tính bằng cách thuận tiện nhất
a) 13/29(29/5-45/8)-45/8(9/8-13/29)
b) 15/7(1/5-46/45)+46/45(15/7-45/46)
c) 43/47(18/37+47/43)-18/37(43/47+37/36)
tính bằng cách thuận tiện nhất a) 13/29(29/5-45/8)-45/8(9/8-13/29) b) 15/7(1/5-46/45)+46/45(15/7-45/46) c) 43/47(18/37+47/43)-18/37(43/47+37/36)
By Alaia
a) 13/29(29/5-45/8)-45/8(9/8-13/29)=-3.728125
b) 15/7(1/5-46/45)+46/45(15/7-45/46)=-0.57142857142
c) 43/47(18/37+47/43)-18/37(43/47+37/36)=0.5