Question

Tính:

a) 17 - 11 - 14 - (-39)                              b) 125 - 4[ 3 - 7.(-2) ]

c) (-2)⁷ : (-2)⁴ + 8                                    d) (-14) . 9 - 13 . (-9)

Answer 1

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https://h.vn/hoi-dap/question/548783.html

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Answer 2

\(a,17-11-14-\left(-39\right)\)

\(=17-11-14+39\)

\(=\left(17+39\right)-\left(11+14\right)\)

\\(=56-25=26\)

\(b,125-4.\left[3-7\left(-2\right)\right]\)

\(=125-4.\left[3+14\right]\)

\(=125-4.17\)

\(=125-68=57\)

\(c,\left(-2\right)^7:\left(-2\right)^4+8\)

\(=\left(-2\right)^3+8\)

\(=-8+8=0\)

\(d,-14.9-13.\left(-9\right)\)

\(=14.\left(-9\right)-13.\left(-9\right)\)

\(=\left(-9\right).\left(14-13\right)\)

\(=-9.1=-9\)