Nguyễn Nhật Nam
Giới thiệu về bản thân
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2024-02-20 21:39:58
a) -2/7 + 2/7 : 3/5 b) -8/19 + (-4/21) - 17/21 + 27/19 c) 6/5 . 3/13 - 6/5 . 16/13
= -2/7 + 6/35 = ( -8/19 + 27/19 ) - ( 4/21 + 17/21) = 6/5 . (16/13 - 3/13)
= -10/35 + 6/35 = 1 - 1 = 6/5 . 1
= -4/35 = 0 = 6/5
2023-04-14 21:00:41
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