Question

tính nhanh

a) -75 . ( 18 - 65 ) -65 . ( 75 - 18 )

b)-( -2010 ) + 36 . 41 - 36 . ( -59 ) + ( -2010 )

Answer 1

\(\left(-75\right)\left(18-65\right)-65\left(75-18\right)\)

\(=\left(-75\right).18-\left(-75\right).65-65.75+65.18\)

\(=\left(-75\right).18+75.65-65.75+65.18\)

\(=18.\left[\left(-75\right)+65\right]+\left(75.65-65.75\right)\)

\(=18.\left(-10\right)=-180\)

P/s: Hoq chắc

Answer 2

\(-\left(-2010\right)+36.41-36.\left(-59\right)+\left(-2010\right)\)

\(=2010+\left(-2010\right)+36.\left[41-\left(-59\right)\right]\)

\(=36.100=3600\)