Bài 6:
a: \(45\cdot\left(-24\right)+\left(-10\right)\cdot\left(-12\right)\)
\(=-45\cdot24+120\)
=-1080+120
=-960
b: \(\left(-134\right)+51\cdot134+\left(-134\right)\cdot48\)
\(=134\left(-1+51-48\right)=134\cdot2\)
=268
c: \(\left(-41\right)\left(59+2\right)+59\left(41-2\right)\)
\(=-41\cdot59-41\cdot2+59\cdot41-59\cdot2\)
\(=-2\cdot41-2\cdot59=-2\cdot100=-200\)
d: \(369\cdot\left(-2\right)-41\cdot82\)
\(=41\cdot\left(-18\right)-41\cdot82\)
\(=41\left(-18-82\right)=41\cdot\left(-100\right)=-4100\)
e: \(\left(135-35\right)\cdot\left(-37\right)+37\cdot\left(-42-58\right)\)
\(=-37\cdot100+37\cdot\left(-100\right)\)
=-7400
Bài 5:
a: \(44\cdot\left(-50\right)-50\cdot56\)
\(=-50\cdot\left(44+56\right)\)
\(=-50\cdot100=-5000\)
b: \(31\cdot72-31\cdot70-31\cdot2\)
\(=31\cdot\left(72-70-2\right)\)
=0
c: \(-67\left(1-301\right)-301\cdot67\)
\(=-67\cdot1+67\cdot301-67\cdot301\)
=-67
d: \(\left(-3879-3879-3879-3879\right)\cdot\left(-25\right)\)
\(=-3879\cdot4\cdot\left(-25\right)\)
\(=3879\cdot100=387900\)
e: \(\left(-2\right)^4\cdot289-16\cdot189\)
\(=16\cdot289-16\cdot189\)
\(=16\left(289-189\right)\)
\(=16\cdot100=1600\)
f: \(\left(-8\right)^2\cdot19+19\cdot\left(-6\right)^2\)
\(=64\cdot19+36\cdot19=19\left(64+36\right)=19\cdot100=1900\)
