Question

a) 11/30 - 2/5*1/6

б)(1 3/8+3 2/3):11/12

в)12 - 1 2/5*1 1/3

г) 28/1/2*2/3
помогите пожалуйста

Answer 1

a) 11/30 - 2/5*1/6 = 11/20 - 1/5 • 1/3 = 11/30 - 1/15 = (11-2•1)/30 = 9/30 = 3/10

б)(1 3/8+3 2/3):11/12 = ( (1+3) + (3/8 + 2/3) )• 12/11 = (4 + 25/24) • 12/11 = (4+1+1/24) = (5 1/24) • 12/11 = 121/24 • 12/11 = 11/2 = 5 1/2

в)12 - 1 2/5*1 1/3 = 84/5 • 1 1/3 = (84•1)/(5•3) = 336/15 = 112/5 = 22 2/5

г) 28/1/2*2/3 = 56 • 2/3 = 112/3 = 37 1/3