Răspuns:
Explicație pas cu pas:
3=3
4=2^2
5=5
__________
cmmmc=3x2^2x5=12x5=60
[tex]\displaystyle (^{(60}1-^{(20}\frac{2}{3} +^{(15}\frac{3}{4} -^{(12}\frac{4}{5} ):\frac{17}{60} =(\frac{60}{60} -\frac{40}{60} +\frac{45}{60} -\frac{48}{60} ):\frac{17}{60} =\frac{17}{60} \times \frac{60}{17} =1[/tex]
