Question

2 1115+x=5целых215
х-2 516=4целых1316

Answer 1

1)5 2/15-2 11/15=2 6/15
2 11/15+2 6/15=5 2/15
2)4 13/16+2 5/16=6 18/16=7 2/16
7 2/16- 2 5/16=4 13/16