 <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. <yor> 5 x 1 / 2 = 10 ìdajì hamburgers tí a fi 5 hamburgers kíkún ṣe. Àwọn ọ̀rẹ́ tó wà nípò kìíní àti ìkejì ní 1+2=3 tí wọ́n pín. Àwọn ọ̀rẹ́ rẹ̀ kẹta àti kẹrin rí i pé 3 àti 3 jẹ́ 6 ẹyọ. Àwọn ọ̀rẹ́ mẹ́rin tí Era ní ló gba 3 àti 6 tó jẹ́ 9. Nítorí náà, Era ní 10 - 9 = 1 slice. Nítorí náà ìdáhùn náà ni 1. 