Tính hợp lý
Bài 1 : Tính hợp lý
a) 1/3 + 5/2 - 11/12
b) -7/5 + 8/13 + -3/5 + 5/13
c) -4/13 . 5/11 + -4/13 : 11/6 - 18/26
d) 2021/2022 .7/18 - 2021/2022 .11/-18
a) 1/3 + 5/2 - 11/12
b) -7/5 + 8/13 + -3/5 + 5/13
c) -4/13 . 5/11 + -4/13 : 11/6 - 18/26
d) 2021/2022 .7/18 - 2021/2022 .11/-18