1)(176+343)-243=276
1. 176+343=519 2. 519-243= 276
2)(684 +915) - 484=1115
1.684+915=1599 2. 1599-484=1115
3)(259+101) -59=301
1. 259+101=360 2. 360-59=301
4) 1287-(487+164)=636
1. 487+164= 651 2. 1287-651=636
5) 971- (235+371)= 365
1. 235+371=606 2. 971-606=365
6) 5393-(1393 +158) =2842
1. 1393+158= 1551 2.5393-1551=3842