Question

tính nhanh: sos 

258 x 248 + 574 x 258

567 x 245 - 567 x 145

 

Answer 1

a: \(258\cdot248+574\cdot258\)

\(=258\left(248+574\right)\)

\(=258\cdot822=212076\)

b: \(567\cdot245-567\cdot145\)

\(=567\left(245-145\right)\)

\(=567\cdot100=56700\)

Answer 2

258 x 248 + 574 x 258

= 258 x ( 248 + 574 ) = 258 x 822 = 212 076

567 x 245 - 567 x 145

= 567 x ( 245 - 145 ) = 567 x 100 = 56 700