b) ( 1/3+1/6). 1/11-1/2: (1-1/12)
Giải thích
b) 13+16.111−12:1−112
=26+16.111−12:1212−112
=36.111−12:1112=12.111−12.1211
=12.111−1211=12.−1111=−12.
b) 13+16.111−12:1−112
=26+16.111−12:1212−112
=36.111−12:1112=12.111−12.1211
=12.111−1211=12.−1111=−12.