Trịnh Mai Khanh
Giới thiệu về bản thân
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2023-12-10 18:25:11
a) 7/2 - (3/4 + 1/5)
= 7/2 - 19/20
= 51/20
b) 12/23 . 7/13 + 11/23 . 7/13
= 7/13 . (12/23 + 11/23)
= 7/13 . 1
= 7/13
c) |-2| - (5/9 - 2/3)² : 4/27
= 2 - 1/81 : 4/27
= 2 - 1/12
= 23/12
2023-10-11 20:14:55
a)
2023-10-11 20:12:30
a)
2023-10-11 20:12:10
a)
2023-10-11 20:11:28
a)