Rút gọn các phân số sau:a)13.9−13.225−12;b)42−14.87+21.3;c)9.6−18.412.3d)5.529.102−4.102;e)(−7).3−4.(−6)(−5).3−2.3;f)(−17).13+17.2−11.2−11.9

Rút gọn các phân số sau:

a)13.9−13.225−12;b)42−14.87+21.3;c)9.6−18.412.3

d)5.529.102−4.102;e)(−7).3−4.(−6)(−5).3−2.3;f)(−17).13+17.2−11.2−11.9