Răspuns:
4753 +1211=5964
b) 7600+2400 =10000 (7600-2400)=5200
6704 + 2203=8907
5170 + 2140 =7310 (5170-2140)=3030
12425 +13172=25597
16598 - 12173 =4425
745240 +120734 =865974
219176-109142 =110034
c) 1672 +2124 - 386=3410
17903 +12096 - 20992 =9007
145942–42921 +11111=114132
29788-19643-12000 = -1855