Thực hiện phép tính:
a) \(\left(-34\right).136+34.36\)
b) \(\left(-2\right)^4.5^2\)
c) \(\left(-8\right).4.5.\left(-125\right).20\)
d) \(19.\left(-123\right)+\left(-19\right).14+19.37\)
Hướng dẫn giải
a)\(\left(-34\right).136+34.36\)
\(=34.\left[\left(-136\right)+36\right]\)
\(=34.\left(-100\right)\)
\(=-3400\)
b)\(\left(-2\right)^4.5^2\)
\(=\left(-2\right).\left(-2\right).\left(-2\right).\left(-2\right).25\)
\(=16.25=400\)
c) \(\left(-8\right).4.5.\left(-125\right).20\)
\(=\left(-8\right).\left(-125\right).5.20.4\)
\(=1000.100.4\)
\(=400000\)
d) \(19.\left(-123\right)+\left(-19\right).14+19.37\)
\(=19.\left[\left(-123\right)+\left(-14\right)+37\right]\)
\(=19.\left(-100\right)=-1900\)