Решите плиз!!!!!!!!!!

Question

Решите плиз!!!!!!!!!!

---

Answer 1

1)1 1/4*0,24=5/4*6/25=3/10
2)3 1/3-3/10=3 10/30-9/30=3 1/30
3)-0,91:3 1/30=-91/100:91/30=-91/100*30/91=-3/10
4)-3/10+0,4=-0,3+0,4=0,1