Question

Помогите ПРОШУУУУУУ !!! НОМЕР 472 И ВСЁ!!!!

Answer 1

-3.1+(2.8+(-0.9))= -3.1+1.9= -1.2

(-2 3/7+5 1/14)+(-3.2)= (-17/7+71/14)+(-3.2)=((-34+71)/14)+(-3.2)=37/14+(-3.2)=37/14-3 1/5=37/14-16/5=(185-224)/70= -39/70