Răspuns:
3) 4100-2000=2100
900-405=495
1000-509=491
3000-25=2975
4200-808=3392
8723-1200=7523
9789-5321=4468
2308-1005=1303
5378-805=4573
4781-601=4180
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4) 650 ml+150 ml=800 ml suc a preparat
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5) 250g-50g=200 g nuci a cules Maria