a)146 . 273 + 437 . 273 + 273 . 418 - 213
= 146 . 273 + 437 . 273 + 273 . 418 - 1 . 213
= 273 . ( 146 + 437 + 418 - 1 )
= 273 . 1000
= 273 000
A) 146 x 273 + 437 x 273 + 273x 418- 273
= (146 x 273 ) + ( 437 x 418 )
= 39858 + 182666
= 222524
B) 2774 : 38 + 1026 : 38 - 3744 : 18
= ( 2774 : 38 ) + 1026 - ( 3744 : 18 )
= (73 + 1026 ) - 208
= 1099 - 208
= 891
C) 248 + 147 x 36 - 3744 : 18
= 248 + ( 147 x 36 ) - ( 3744 : 18 )
= ( 248 + 52592 ) - 208
= 52840 - 208
= 52632
D) 196 x 39 + 84 x 98 + 21 x 196 - 392
= ( 196 x 39 ) + ( 84 x 98 ) + 21 - 392
= ( 7644 + 8232 ) + 21 - 392
= ( 15876 + 21 ) - 392
= 15897 - 392
= 15505
a.=273x(146+437+418-1)
=273x1000
=273000
b.=(2774+1026):38+(25x4)x5x7
=3800:38 + 100x35
=100 +3500
= 3600