👤

calculati rapid grupand convenabil termenii 1800+453+1200, 2005+4352+2005,2456+3200+3800

Răspuns :

3000+453=3453
4010+4352=8362
2456+7000=9456
(1800+1200)+453=3453
(2005+2005)+4352=4010+4352=8362
(3200+3800)+2456=9456