Răspuns:
I = 27•51+51•34-60•51 = 51
= 51• ( 27+34-60)
=51•(61-60)
=51•1
a= 51
C=33•44+55•33-33•99= 0
=33•(44+55-99)
=33•0
=0
A=9•15+15•6+5•15= 300
=15•(9+6+5)
=15•20
=300
D=4•35+4•52+4•13= 400
=4•(35+52+13)
=4•100
=400
R=210•304-150•304+940•304=304 000
=304•(210-150+940)
= 304•1000
=304000