Question

Tính bằng cách thuận tiện

a) 35 x 9 - 35 x 7 =...............................................

b) 536 x 8 - 536 x 6 =..........................................

Answer 1

\(a.35\cdot9-35\cdot7\\ =35\cdot\left(9-7\right)\\ =35\cdot2=70\\ b.536\cdot8-536\cdot6\\ =536\cdot\left(8-6\right)\\ =536\cdot2=........\)

Answer 2

a) \(35\times9-35\times7=35\times\left(9-7\right)=35\times2=70\)

b) \(536\times8-536\times6=536\times\left(8-6\right)=536\times2=1072\)