100 - 3,8*4,6 - 13,26:6,5= 80,48

3,8*4,6=17,48

13,26/6,5=2,04

100-17,48-2,04=80,48

Verified answer

1)3.8*4.6=17,48

2) 13.26:6.5=2.04

3)100-17.48=82.52

4) 82.52-2.04=80.48

Ответ: 80.48

Наверно так.