Question

tính bằng cách hợp lí nhất

giúp t vs

Answer 1

h: \(\left[\left(-4\right)\cdot\left(-9\right)-6\right]\left[\left(-12\right)-\left(-7\right)\right]\)

\(=\left(36-6\right)\left(-12+7\right)\)

\(=-5\cdot30=-150\)

k: \(125\cdot\left(-24\right)+24\cdot225\)

\(=24\cdot\left(-125\right)+24\cdot225\)

\(=24\left(225-125\right)\)

\(=24\cdot100=2400\)

m: \(\left(-4\right)\cdot13\cdot\left(-250\right)\)

\(=13\cdot4\cdot250\)

\(=13\cdot1000=13000\)

o: \(-43\left(1-296\right)-296\cdot43\)

\(=-43\cdot1+43\cdot296-43\cdot296\)

\(=-43\cdot1=-43\)