Question

Вычесли  удобным способом (396+278)+104= 439+152+48+61= 5*18*2*3= 9*4*25=

Answer 1

1) (278+104)+396=...
2) (48+61)+(439+152)=...
3) (2*3*5)+(9*4)+(25*18)=...

Answer 2

(396+104)+278=500+278=778
(439+61)+(152+48)=500+200=700
(5*2)*(18*3)=10*54=540
(4*25)*9=100*9=900