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a fost răspuns

Calculeaza si efectueaza proba:
153+1239=
257+2016=
2785-396=
5436-2145=
4723+1539=
6781-2599=
pls repede!!

Răspuns :

153+1239=1392
257+2016=2273
2785-396=2389
5436-2145=3311
4723+1539=6262
6781-2599=4182
proba:
1392-153=1239
2273-257=2016
2389+396=2785
3311+2145=5436
6262-1539=4723
4182+2599=6781