Question

помогите пожалуйста ​

Answer 1

а) 2/5 - 6/7 - 1/10 = 28/70  - 60/70 - 7/70 = 28/70 + (-60/70) + (-7/70) = -32/70 + (-7/70) = - 39/70

б) -1/2:(-3/4)*1 1/8 = -4/8 : (-6/8) * 1 1/8 = 2/3 * 9/8 = 3/4

в) 1,2-(-5)=1,2+5 = 6,2