Question

1, tính nhanh ( nếu có thể)

a, (-25).21.(-2)\(^2\).(-|-3|).(-1)\(^{2015}\)

b,(-5)\(^3\).67.(-|-2\(^3\)|).(-1)\(^{2014}\)

c,35.18-5.7.28+35.(-90)

d,24.(16-5)-16.(24-5)

e,-79.(73-27)-73.(-79-27)

Giúp mk nha, bài tập tết nhiều quá!!!! làm đc mk tick cho nek:)))>_<

Answer 1

a, (-25).21.(-2)${}^{}$.(-|-3|).(-1)${}^{}$

= (-25).21.4.(-3). (-1)

= (-25).21.4.3

= (-25).4.21.3

= -100. 63

= -6300

c,35.18-5.7.28+35.(-90)

= 35.18 - 35.28 + 35.(-90)

= 35. [18 - 28 + (-90) ]

= 35. (-100)

= -3500

Answer 2

a: \(=-25\cdot21\cdot4\cdot-3\cdot\left(-1\right)=25\cdot21\cdot4\cdot\left(-3\right)=-6300\)

b: \(=\left(-125\right)\cdot67\cdot\left(-8\right)=67000\)

c: \(=35\cdot18-35\cdot28+35\cdot\left(-90\right)\)

\(=35\left(18-28-90\right)=35\cdot\left(-100\right)=-3500\)

d: \(=24\cdot16-24\cdot5-16\cdot24+16\cdot5=5\cdot\left(-8\right)=-40\)

e: \(=-79\cdot73+79\cdot27+73\cdot79+73\cdot27\)

\(=27\cdot152=4104\)