1.a 8015 7048+967=8015 b 3823 4785+3823=8608 c 6535-2704=3831 3831+2704=6535 d 5114 5114+2142=7256
2 a=7405-3150 b=3512+2140 c=8505-3106
a=4250 b=5652 c=5499
3.descazutul 3205+4604=7809
4.a 2473-590=1883 b 9900+3715=13.615 c 4005+2734=6739 sper ca te-am ajutat