c: \(125\cdot\left(-24\right)+24\cdot225\)
\(=24\cdot\left(-125\right)+24\cdot225\)
\(=24\left(-125+225\right)\)
\(=24\cdot100=2400\)
e: \(\left(-37+72\right)\cdot\left(-10\right)+85\cdot\left(-9-11\right)\)
\(=35\cdot\left(-10\right)+85\cdot\left(-20\right)\)
\(=10\cdot\left(-35\right)+10\cdot\left(-170\right)\)
\(=10\left(-35-170\right)=-205\cdot10=-2050\)
d: \(26\cdot\left(-125\right)-125\cdot\left(-36\right)\)
\(=125\cdot\left(-26\right)+125\cdot36\)
\(=125\left(-26+36\right)\)
\(=125\cdot10=1250\)
h: \(\left(-25\right)\left(75-45\right)-75\cdot\left(45-25\right)\)
\(=-25\cdot75+25\cdot45-75\cdot45+75\cdot25\)
\(=25\cdot45-75\cdot45\)
\(=45\left(25-75\right)\)
\(=-50\cdot45=-2250\)
m: \(\left(36-16\right)\cdot\left(-5\right)+6\cdot\left(-14-6\right)\)
\(=20\cdot\left(-5\right)+6\cdot\left(-20\right)\)
\(=20\cdot\left(-5\right)+\left(-6\right)\cdot20\)
\(=20\left(-5-6\right)=-11\cdot20=-220\)
n: \(\left|\left(-4\right)\cdot\left(-9\right)-6\right|\left|\left(-12\right)-\left(-7\right)\right|\)
\(=\left|36-6\right|\cdot\left|-12+7\right|\)
\(=\left|30\right|\cdot\left|-5\right|\)
\(=30\cdot5=150\)
a: \(7\left(10-3\right)-3\left(2-9\right)\)
\(=7\cdot7-3\left(-7\right)\)
\(=7\cdot7+3\cdot7\)
\(=7\cdot\left(7+3\right)=7\cdot10=70\)
b: Bạn ghi lại đề đi bạn
