Datrys 4*3*7+4*5*6*2+5*4*5/9*8*(4+5+2)

$$\frac { 4 \times 3 \times 7 + 4 \times 5 \times 6 \times 2 + 5 \times 4 \times 5 } { 9 \times 8 \times ( 4 + 5 + 2 ) }$$

Enrhifo

$$\frac{53}{99}\approx 0.535353535$$

Camau Ateb

Lluosi 4 a 3 i gael 12. Lluosi 4 a 5 i gael 20. Lluosi 5 a 4 i gael 20.

$$\frac{12\times 7+20\times 6\times 2+20\times 5}{9\times 8\left(4+5+2\right)}$$

Lluosi 12 a 7 i gael 84.

$$\frac{84+20\times 6\times 2+20\times 5}{9\times 8\left(4+5+2\right)}$$

Lluosi 20 a 6 i gael 120.

$$\frac{84+120\times 2+20\times 5}{9\times 8\left(4+5+2\right)}$$

Lluosi 120 a 2 i gael 240.

$$\frac{84+240+20\times 5}{9\times 8\left(4+5+2\right)}$$

Adio 84 a 240 i gael 324.

$$\frac{324+20\times 5}{9\times 8\left(4+5+2\right)}$$

Lluosi 20 a 5 i gael 100.

$$\frac{324+100}{9\times 8\left(4+5+2\right)}$$

Adio 324 a 100 i gael 424.

$$\frac{424}{9\times 8\left(4+5+2\right)}$$

Lluosi 9 a 8 i gael 72.

$$\frac{424}{72\left(4+5+2\right)}$$

Adio 4 a 5 i gael 9.

$$\frac{424}{72\left(9+2\right)}$$

Adio 9 a 2 i gael 11.

$$\frac{424}{72\times 11}$$

Lluosi 72 a 11 i gael 792.

$$\frac{424}{792}$$

Lleihau'r ffracsiwn \frac{424}{792} i'r graddau lleiaf posib drwy dynnu a chanslo allan 8.

$$\frac{53}{99}$$

Ffactor

$$\frac{53}{3 ^ {2} \cdot 11} = 0.5353535353535354$$