Question

calculati prin metoda cea mai rationala
a)18*17+12*17
b)129*24+76*129
c)19*36-9*36
d)73*58-58*72

Answer 1

a) 18*17+12*17=17*(18+12)=17*30=510
b) 129*24+76*129=129*(24+76)=129*100=12900
c) 19*36-9*36=36*(19-9)=36*10=360
d) 73*58-58*72=58*(73-72)=58*1=58

Answer 2

18x17+12x17=17(18+12)=17x30=510
129x24+76x129=129(24+76)=129x100=12900
19x36-9x36=36(19-9)=36x10=360
73x58 - 58x72=58(73-72)=58x1=58