M= (-3,8+4,3) :(-1,6)= (4,3-3,8): 1,6= 0,3125.
Или
М= (-3,8+4,3): (- 16/10)= 0,5• -10/16= 1/2• -10/16= 1/1• -5/16= -5/16.
N= (5 7/8 -6 1/12): 3 1/8= (5 (7•3)/(8•3)- 6 (1•2)/(2•12) ) : (3•8+1)/8=
(5 21/24- 6 2/24): 25/8= (5 21/24- 5 (24•1+2)/24 )• 8/25=
(5 21/24- 5 26/24)• 8/25= -5/24• 8/25= -1/3• 1/5= -1/15.
Или так
N= (5 7/8- 6 1/12): 3 1/8= 5 7/8: 3 1/8 - 6 1/12: 3 1/8= (5•8+7)/8 : (3•8+1)/8 - (6•12+1)/12 : (3•8+1)/8= 47/8 :25/8 - 73/12: 25/8= 47/8• 8/25- 73/12• 8/25= 47/1• 1/25- 73/3• 2/25= 47/25- 146/75= (47•3)/(25•3)- 146/75= 141/75- 146/75= -(146/75- 141/75)= -5/75= -1/15.
Р= (-3 5/12 -2 4/15)• 60= - (3 5/12+ 2 4/15)• 60= - ( 3 (5•5)/(12•5)+ 2 (4•4)/(15•4) ) • 60= -(3 25/60+ 2 16/60)• 60=
-5 41/60• 60= -5 • 60+ (-41/60• 60)= -5•60+ (-41)= -300= (-41)= -341.
Или так
Р= (-3 5/12- 2 4/15)• 60= -(3•12+5)/12• 60/1 - (15•2+4)/15 • 60/1= -41/12• 60/1 - 34/15• 60/1= -41/1• 5/1- 34/1• 4/1= -41• 5 - 34• 4= -( 41•5+ 34•4)= -(205+136)= -341.
M= -5/16; n= -1/15; p= -341;
Наименьшее из них Р=-341.