Question

Помогите!!! 31 : 2 9/11

Answer 1

$31 \div 2 \frac{9}{11} = \\ 31 \div \frac{31}{11} = {31} \times \frac{11}{31} = 11$

Answer 2

1)31:2=15,5
2)9\11=0,8
3)15,5•0,8=12,4