Datrys 30-(1-58/10)+16

$$30 - ( 1 - 5 \frac { 8 } { 10 } ) + 16$$

Enrhifo

$$\frac{254}{5}=50.8$$

Camau Ateb

Lluosi 5 a 10 i gael 50.

$$30-\left(1-\frac{50+8}{10}\right)+16$$

Adio 50 a 8 i gael 58.

$$30-\left(1-\frac{58}{10}\right)+16$$

Lleihau'r ffracsiwn \frac{58}{10} i'r graddau lleiaf posib drwy dynnu a chanslo allan 2.

$$30-\left(1-\frac{29}{5}\right)+16$$

Troswch y rhif degol 1 i’r ffracsiwn \frac{5}{5}.

$$30-\left(\frac{5}{5}-\frac{29}{5}\right)+16$$

Gan fod gan \frac{5}{5} a \frac{29}{5} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$30-\frac{5-29}{5}+16$$

Tynnu 29 o 5 i gael -24.

$$30-\left(-\frac{24}{5}\right)+16$$

Gwrthwyneb -\frac{24}{5} yw \frac{24}{5}.

$$30+\frac{24}{5}+16$$

Troswch y rhif degol 30 i’r ffracsiwn \frac{150}{5}.

$$\frac{150}{5}+\frac{24}{5}+16$$

Gan fod gan \frac{150}{5} a \frac{24}{5} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{150+24}{5}+16$$

Adio 150 a 24 i gael 174.

$$\frac{174}{5}+16$$

Troswch y rhif degol 16 i’r ffracsiwn \frac{80}{5}.

$$\frac{174}{5}+\frac{80}{5}$$

Gan fod gan \frac{174}{5} a \frac{80}{5} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{174+80}{5}$$

Adio 174 a 80 i gael 254.

$$\frac{254}{5}$$

Ffactor

$$\frac{2 \cdot 127}{5} = 50\frac{4}{5} = 50.8$$