a) 35×349+35×251=
=35×(349+251)=
=35×600=
=21 000
b)42×504-104×42=
=42×(504-104)=
=42×400=
=16 800
d) 64×395+64×505=
=64×(395+505)=
=64×900=
=57 600
e) 47×108+47×292=
=47×(108+292)=
=47×400=
=18 800
b)nu am înțeles ce ai scris...10 s?
c) 55×636-436×55=
=55×(636-436)=
=55×200=
=11 000
f) 809×75-509×75=
=75×(809-509)=
=75×300=
=22 500
•Sper că te-am ajutat•