Datrys 25-4/25-9

$$25 - \frac { 4 } { 25 } - 9$$

Enrhifo

$$\frac{396}{25}=15.84$$

Camau Ateb

Troswch y rhif degol 25 i’r ffracsiwn \frac{625}{25}.

$$\frac{625}{25}-\frac{4}{25}-9$$

Gan fod gan \frac{625}{25} a \frac{4}{25} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$\frac{625-4}{25}-9$$

Tynnu 4 o 625 i gael 621.

$$\frac{621}{25}-9$$

Troswch y rhif degol 9 i’r ffracsiwn \frac{225}{25}.

$$\frac{621}{25}-\frac{225}{25}$$

Gan fod gan \frac{621}{25} a \frac{225}{25} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$\frac{621-225}{25}$$

Tynnu 225 o 621 i gael 396.

$$\frac{396}{25}$$

Ffactor

$$\frac{2 ^ {2} \cdot 3 ^ {2} \cdot 11}{5 ^ {2}} = 15\frac{21}{25} = 15.84$$