1) (716+34,13)+87=750,13+87=837,13
2) 239+(36,61+14)=239+50,61=289,61
3) (442+58,44)+56=500,44+56=556,44
1) (716+34,13)+87=750,13+87=837,13
2) 239+(36,61+14)=239+50,61=289,61
3) (442+58,44)+56=500,44+56=556,44