2,5:1\5-(4\5-1)решиите пж срочнооо!!!!!

Question

2,5:1\5-(4\5-1)
решиите пж срочнооо!!!!!

Answer 1

=5/2:1/5-4/5-1=5/2*5-4/5-1=25/2-9/5=125/10-18/10=107/10=10 7/10=10,7