Răspuns:
Explicație pas cu pas:
a) 814-312=502 rotunjit la zeci = 500 , rotunjit la sute = 500
b) 1348-312=1036 rotunjit la zeci=1040, rotunjit la sute =1000
c) 543-312= 231 rotunjit la zeci = 230 , rotunjit la sute = 200
d) 1077-312= 765 rotunjit la zeci = 770 , rotunjit la sute =800
e) 799-312= 487 rotunjit la zeci = 490, rotunjit la sute = 500
f) 3012-312= 2700 rotunjit la zeci = 2700 , rotunjit la sute = 2700
g) 527+7612-312= 7827 rotunjit la zeci =7830 , rotunjit la sute = 7800
h) 513447-3271-312= 509864 rotunjit la zeci = 509860, rotunjit la sute = 509900
i) 256349-9871-312= 246166 rotunjit la zeci=24170 , rotunjit la sute = 246200
