a ) -24.82+24.(-17)-24 b) 134.23+134.17-40.134 c) (-123)+/ -18 / + 23+(-18) d) 46. (51-27) -51.(46-27) e) 1.5^2-2.3^3+6^11:6^9 f) 126+/-53/+20 –

0 bình luận về “a ) -24.82+24.(-17)-24 b) 134.23+134.17-40.134 c) (-123)+/ -18 / + 23+(-18) d) 46. (51-27) -51.(46-27) e) 1.5^2-2.3^3+6^11:6^9 f) 126+/-53/+20 –”

1. Đáp án + giải thích bước giải :

   `a) -24 . 82 + 24 . (-17) – 24 = 24 . [-82 + (-17) – 1] = 24 . (-100) = -2400`

   `b) 134 . 23 +134 . 17 – 40 . 134 = 134 . (23 + 17 – 40) = 134 . 0 = 0`

   `c) (-123) + |-18| + 23 + (-18) = -123 + 18 + 23 + (-18) = [-123 + 23] + [18 + (-18)] = -100 + 0 = -100`

   `d) 46 . (51 – 27) – 51 . (46 – 27) = 46 . 24 – 51 . 19 = 1104 – 969 = 135`

   `e) 1 . 5^2 – 2 . 3^3 + 6^{11} : 6^9 = 1 . 25 – 2 . 27 + 6^2 = 25 – 54 + 26 = -29 + 26 = -3`

   `f) 126 + |-53| + 20 – (53 + |-126|) = 126 + 53 + 2 – 53 – 126 = (126 – 126) + (53 – 53) + 2 = 2`

   `g) 5 – 2018^0 [(7^{10} : 7^8 + 81 – 5 . 2^3) : 15] = 5 – 1 [(49 + 81 – 40) : 15] = 5 – [90 : 15] = 5 – 6 = -1`

    

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