\(254x147-127x92-254\)
\(=254x147-\left(127x2\right)x46-254\)
\(=254x147-254x46-254\)
\(=254x\left(147-46-1\right)\)
\(=254x100=25400\)
\(254\times147-127\times92-254\)
\(=254\times147-254\times46-254\times1\)
\(=254\times\left(147-46-1\right)\)
\(=254\times100\)
\(=25400\)
254 x 147 - 127 x 92 - 254 = 254 x ( 100 + 40 +7 ) - 127 x ( 100 - 8 ) - 254.
= 254 x 100 + 254 x 40 + 254 x 7 - 127 x 100 - 127 x 8 - ( 200 + 50 + 4 ).
= 25400 + 10160 + 1778 - 12700 - 1016 - ( 204 + 50 ).
= 25654 - 254 = 25400
254 x 147 - 254 x 92 - 254
= 254 x 147 - 254 x 92 - 254 x 1
= 254 x ( 147 - 92 -1 )
= 254 x 100
= 25 400 .
đúng thì nha
