Question

tính thuận tiện :

a) (−23+37):45+(−13+47):45(−23+37):45+(−13+47):45

b) 59:(111−522)+59:(115−23)

 

Answer 1

\(=\left(-23+27-13+47-23+37-13+47\right):45\)\(=\left(-23.2-13.2+27.2+47.2\right):45=\left(-72+148\right):45=\frac{76}{45}\)\(=59:\left(111-522+115-23\right)=59:\left(-319\right)\)