Datrys 32-28/1357-1261*(1338-1261)+28

$$\frac{ 32-28 }{ 1357-1261 } \times (1338-1261)+28$$

Enrhifo

$$\frac{749}{24}\approx 31.208333333$$

Camau Ateb

Tynnu 28 o 32 i gael 4.

$$\frac{4}{1357-1261}\left(1338-1261\right)+28$$

Tynnu 1261 o 1357 i gael 96.

$$\frac{4}{96}\left(1338-1261\right)+28$$

Lleihau'r ffracsiwn \frac{4}{96} i'r graddau lleiaf posib drwy dynnu a chanslo allan 4.

$$\frac{1}{24}\left(1338-1261\right)+28$$

Tynnu 1261 o 1338 i gael 77.

$$\frac{1}{24}\times 77+28$$

Lluosi \frac{1}{24} a 77 i gael \frac{77}{24}.

$$\frac{77}{24}+28$$

Troswch y rhif degol 28 i’r ffracsiwn \frac{672}{24}.

$$\frac{77}{24}+\frac{672}{24}$$

Gan fod gan \frac{77}{24} a \frac{672}{24} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{77+672}{24}$$

Adio 77 a 672 i gael 749.

$$\frac{749}{24}$$

Ffactor

$$\frac{7 \cdot 107}{2 ^ {3} \cdot 3} = 31\frac{5}{24} = 31.208333333333332$$