ta có : 47*11-4700*0,1-47
=47*11-47*100*0,1-47
=47*11-47*(100*0,1)-47
=47*11-47*10-47*1
=47*(11-10-1)
=47*0=0
Vậy (7,5*18,3+26,4*18,3)*0=0
Tính:
(7,5×18,3+26,4×18,3)×(47×11-4700×0,1-47)
= 18,3 ( 7,5 + 26,4) . 47 ( 11 - 10 - 1)
= 18,3 . 33,9 . 47 . 0
= 0