Question

calculati: 4,1(15)·99-13,(12)·100+16,0(21)·1000 =

Answer 1

4,1(15) · 99 - 13,(12) · 100 + 16,0(21) · 1000 = 

4,1(15) = 679/165
13,(12) = 433/33
16,0(21) = 5287/330

679/165 · 99 - 433/33 · 100 + 5287/330 · 1000 = 
= (679 · 3) : 5 - (433 · 100) : 33 + (5287 · 100) : 33 = 
= 2037/5 - 43300/33 + 528700/33 = 
= (67221 - 216500 + 2643500) : 165 = 
= (-149279 + 2643500) : 165 = 
= 2494221/165 = 831407/55.

/robertinni