Question

(12,4-8,9)*1 3/7 +2 4/9​

Answer 1

(124/10-89/10)* 10/7+22/9=
1 в скобках 124/10-89/10=7/2=3,5
2) 7/2*10/7= 5/1=5
3) 5/1 + 22/9= 45+22/9=67/9=7 4/9