Tính (tính nhanh) : a, 1/2 . 25/3 : -2/15 . 12/24 – 1/3 b, 5/8 + (-5/8 + -3/5) – 4/5 + 1 c, 2 . -13 . 9 . 10/ (-3) . 4 . (-5) . 26 d, (1/3 + 12/67 + 1
Tính (tính nhanh) : a, 1/2 . 25/3 : -2/15 . 12/24 – 1/3 b, 5/8 + (-5/8 + -3/5) – 4/5 + 1 c, 2 . -13 . 9 . 10/ (-3) . 4 . (-5) . 26 d, (1/3 + 12/67 + 13/41) – (79/67 – 28/41)