231). (343-243)+176=276 (1287-487)+164=964
(684-484)+915=1115 (971-371)+235=835
(259-59)+101=301 (5393-1393)+158=4158
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Answers & Comments
1) (176+343)-243= (343-243)+176= 100+176=276
2)(684+915)-484= (684-484)+915= 200+915=1115
3)(259+101)-59= (259-59)+101= 200+101=301
4)1287-(487+164)= (1287-487)+164= 800+164=964
5)971-(235+371)= (971-371)+235= 600+235=835
6)5393-(1393+158)= (5393-1393)+158= 4000+158=4158
231). (343-243)+176=276 (1287-487)+164=964
(684-484)+915=1115 (971-371)+235=835
(259-59)+101=301 (5393-1393)+158=4158