Datrys 31/110-(21/110+1/110)

$$3 \frac { 1 } { 110 } - ( 2 \frac { 1 } { 110 } + \frac { 1 } { 110 } )$$

Enrhifo

$$\frac{109}{110}\approx 0.990909091$$

Camau Ateb

Lluosi 3 a 110 i gael 330.

$$\frac{330+1}{110}-\left(\frac{2\times 110+1}{110}+\frac{1}{110}\right)$$

Adio 330 a 1 i gael 331.

$$\frac{331}{110}-\left(\frac{2\times 110+1}{110}+\frac{1}{110}\right)$$

Lluosi 2 a 110 i gael 220.

$$\frac{331}{110}-\left(\frac{220+1}{110}+\frac{1}{110}\right)$$

Adio 220 a 1 i gael 221.

$$\frac{331}{110}-\left(\frac{221}{110}+\frac{1}{110}\right)$$

Gan fod gan \frac{221}{110} a \frac{1}{110} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{331}{110}-\frac{221+1}{110}$$

Adio 221 a 1 i gael 222.

$$\frac{331}{110}-\frac{222}{110}$$

Gan fod gan \frac{331}{110} a \frac{222}{110} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$\frac{331-222}{110}$$

Tynnu 222 o 331 i gael 109.

$$\frac{109}{110}$$

Ffactor

$$\frac{109}{2 \cdot 5 \cdot 11} = 0.990909090909091$$