а) 1/9(18*1/9-20)= 1/9(2-20)= 1/9*(-18)= -2
б) (19/8+11/12)*48/5= 19/8*48/5+11/12*48/5= 19*8/5+ 11*4/5= 152/5+44/5= 196/5= 39,2
в) 21/(6/10*28/10)= 21/(3/5*14/5)= 21/(42/25)= 21:(42/25)= 21*25/42= 25/2= 12,5
г) 5√(11*2*22)= 5√22²= 5*22= 110
д) √90*30*3= √90*90= √90²= 90
е) (√23+1)²= 23+2√23+1= 24+2√23
ж) (-7)²(0,8*(-7)²-0,3)+45= 49(39,2-0,3)+45= 49*38,9+45= 1951,1
а) 1/9(18*1/9-20)= 1/9(2-20)= 1/9*(-18)= -2
б) (19/8+11/12)*48/5= 19/8*48/5+11/12*48/5= 19*8/5+ 11*4/5= 152/5+44/5= 196/5= 39,2
в) 21/(6/10*28/10)= 21/(3/5*14/5)= 21/(42/25)= 21:(42/25)= 21*25/42= 25/2= 12,5
г) 5√(11*2*22)= 5√22²= 5*22= 110
д) √90*30*3= √90*90= √90²= 90
е) (√23+1)²= 23+2√23+1= 24+2√23
ж) (-7)²(0,8*(-7)²-0,3)+45= 49(39,2-0,3)+45= 49*38,9+45= 1951,1