Question

e đag gấp lắm ạ mong các bn giúp

Answer 1

a: \(\left(-154\right)\cdot\left(-235\right)+154\cdot\left(-35\right)\)

\(=154\cdot235-154\cdot35\)

\(=154\left(235-35\right)=154\cdot200=30800\)

b: \(\left(-12\right)\left(7-72\right)-25\cdot\left(55-43\right)\)

\(=12\cdot65-25\cdot12\)

\(=12\left(65-25\right)=12\cdot40=480\)

c: \(15\cdot\left(-236\right)+\left(-15\right)\cdot\left(-235\right)\)

\(=15\left(-236\right)+15\cdot235\)

\(=15\left(-236+235\right)=-15\cdot1=-15\)

d: \(237\cdot\left(-28\right)+28\cdot137\)

\(=28\left(137-237\right)\)

\(=28\cdot\left(-100\right)=-2800\)