 
 <translate> There are 5 x 1 / 2 = 10 halves of burgers made from 5 whole burgers. Era's first and second friends got 1 + 2 = 3 slices together. Her third and fourth friends got 3 + 3 = 6 slices together. Era's four friends got 3 + 6 = 9 slices. So, Era is left with 10 - 9 = 1 slice. So the answer is 1. <hau> Akwai 5 x 1 / 2 = 10 rabin hamburgers da aka yi daga 5 dukan hamburgers. Abokan farko da na biyu na Era sun sami 1 + 2 = 3 yanka tare. Abokanta na uku da na huɗu sun sami 3 + 3 = 6 tare. Abokan Era huɗu sun sami 3 + 6 = 9 yanka. Don haka, Era ya rage da 10 - 9 = 1 yanki. Amsar ita ce 1. 