Datrys (-8-1)*(3-(-7.2)div(-2.5+3)

$$(-8-1) \times (3-(-7.2) \div (-2.5+3)$$

Enrhifo

$$-156.6$$

Camau Ateb

Tynnu 1 o -8 i gael -9.

$$-9\left(3-\frac{-7.2}{-2.5+3}\right)$$

Adio -2.5 a 3 i gael 0.5.

$$-9\left(3-\frac{-7.2}{0.5}\right)$$

Ehangu \frac{-7.2}{0.5} drwy luosi'r rhifiadur a'r enwadur gyda 10.

$$-9\left(3-\frac{-72}{5}\right)$$

Gellir ailysgrifennu \frac{-72}{5} fel -\frac{72}{5} drwy echdynnu’r arwydd negatif.

$$-9\left(3-\left(-\frac{72}{5}\right)\right)$$

Gwrthwyneb -\frac{72}{5} yw \frac{72}{5}.

$$-9\left(3+\frac{72}{5}\right)$$

Troswch y rhif degol 3 i’r ffracsiwn \frac{15}{5}.

$$-9\left(\frac{15}{5}+\frac{72}{5}\right)$$

Gan fod gan \frac{15}{5} a \frac{72}{5} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$-9\times \frac{15+72}{5}$$

Adio 15 a 72 i gael 87.

$$-9\times \frac{87}{5}$$

Mynegwch -9\times \frac{87}{5} fel ffracsiwn unigol.

$$\frac{-9\times 87}{5}$$

Lluosi -9 a 87 i gael -783.

$$\frac{-783}{5}$$

Gellir ailysgrifennu \frac{-783}{5} fel -\frac{783}{5} drwy echdynnu’r arwydd negatif.

$$-\frac{783}{5}$$

Ffactor

$$-156.6$$