=246 x 81 +246 x 18+246x1

=246 x(81+18+1)

=246x100=24600

k nha.thanks

246 x 81 + 246 x 18 + 246

= 246 x ( 81 + 18 + 1 )

= 246 x 100

= 24600

\(=246\times\left(145+1-46\right)=246\times100=2460\)

cảm ơn bạn

\(254x147-127x92-254\)

\(=254x147-\left(127x2\right)x46-254\)

\(=254x147-254x46-254\)

\(=254x\left(147-46-1\right)\)

\(=254x100=25400\)

\(254\times147-127\times92-254\)

\(=254\times147-254\times46-254\times1\)

\(=254\times\left(147-46-1\right)\)

\(=254\times100\)

\(=25400\)

x= 102 +246+281+398+254+219

= (102 + 398)+( 281+219)+(246+254)

= 500+ 500+500

= 500 . 3

=1500

đúng 100% luôn đó

\(745\times214+254\times214+214\)

\(=214\times745+214\times254+214\times1\)

\(=214\times\left(745+254+1\right)\)

\(=214\times1000\)

\(=214000\)

= 745 x 214 + 254 x 214 + 214 x1

= 214 x ( 745 + 254 + 1)

= 214 x 1000

= 214000

` (254 + 435) + 565 = 254 + ( 435+565)=254+1000=1254.`

`3,27 + 7,45 + 6,73= (3,27+6,73)+7,45= 10+7.45=17,45.`

`5/9 + ( 4/7 + 4/9 )= (5/9+4/9)+4/7=9/9+4/7= 1+4/7=11/7.`

a: =254+1000=1254

b: =3,27+6,73+7,45=10+7,45=17,45

c: =5/9+4/9+4/7=1+4/7=11/7

346 x 3005 - 3005 x 246 

= 3005 x ( 346 - 246)

= 3005 x 100

= 300 500

346 x 3005 - 3005 x 246 

= 3005 x ( 346 - 246)

= 3005 x 100

= 300 500

254 x 35 + 254 x 24 - 254 x 18 - 254

= 254 x 35 + 254 x 24 - 254 x 18 - 254 x 1

= 254 x ( 35 + 24 - 18 - 1 ) 

= 254 x            40

=     10160

Bang 10160 nha ban

cậu bảo tôi tính thuận tiện làm sao? 76 + 14 = 90 nhé