Heh...
a) √20449+√285156-√54289
√20449=143
√285156=534
√54289=233
143+534-233=444
b) √2916+√41616-√1156
√2916=54
√41616=204
√1156=34
54+204-34=224
c) √229441+√301401-√546121
√229441=479
√301401=549
√546121=739
479+549-739=289
d) √467856-√264196+√826281
√467856=684
√264196=514
√826281=909
684-514+909=1079
Sper că te-am ajutat! Coroniță? :D
