\(0,25\cdot6,117\cdot40-1,117\cdot1,25\cdot8\)
\(=\left(0,25\cdot40\right)\cdot6,117-1,117\cdot\left(1,25\cdot8\right)\)
\(=10\cdot6,117-1,117\cdot10\)
\(=10\cdot\left(6,117-1,117\right)\)
\(=10\cdot5=50\)
Học tốt !!!
Tính bằng cách thuận tiện nhất
0,25 x 6,117 x 40 - 1,117 x 1,25 x 8
= ( 0,25 x 40 ) x 6,117 - 1,117 x ( 1,25 x 8 )
= 10 x 6,117 - 1,117 x 10
= ( 6,117 - 1,117 ) x 10
= 5 x 10
= 50
0,25 x 6,117 x 40 - 1,117 x 1,25 x 8
= ( 0, 25 x 40 ) x ( 6,117 - 1,117 ) x ( 1,25 x8 )
= 10 x 5 x 10
= 500
0,25 x 6,117 x 40 - 1,117 x 1,25 x 8
= 10 x 6,117 - 1,117 x 10
= 10 x ( 6,117 - 1,117 )
= 10 x 5
= 50