Datrys 400-5:{32+(-2)*[18-2*(16-(-2)^4)]}+(-5)^4*(-5)^2=

$$400 - 5 : \{ 32 + ( - 2 ) \cdot [ 18 - 2 \cdot ( 16 - ( - 2 ) ^ { 4 } ) ] \} + ( - 5 ) ^ { 4 } \cdot ( - 5 ) ^ { 2 } =$$

Enrhifo

$$\frac{64105}{4}=16026.25$$

Camau Ateb

Er mwyn lluosi pwerau sy’n rhannu’r un sail, adiwch eu esbonyddion. Adiwch 4 a 2 i gael 6.

$$400-\frac{5}{32-2\left(18-2\left(16-\left(-2\right)^{4}\right)\right)}+\left(-5\right)^{6}$$

Cyfrifo -2 i bŵer 4 a chael 16.

$$400-\frac{5}{32-2\left(18-2\left(16-16\right)\right)}+\left(-5\right)^{6}$$

Tynnu 16 o 16 i gael 0.

$$400-\frac{5}{32-2\left(18-2\times 0\right)}+\left(-5\right)^{6}$$

Lluosi 2 a 0 i gael 0.

$$400-\frac{5}{32-2\left(18-0\right)}+\left(-5\right)^{6}$$

Tynnu 0 o 18 i gael 18.

$$400-\frac{5}{32-2\times 18}+\left(-5\right)^{6}$$

Lluosi -2 a 18 i gael -36.

$$400-\frac{5}{32-36}+\left(-5\right)^{6}$$

Tynnu 36 o 32 i gael -4.

$$400-\frac{5}{-4}+\left(-5\right)^{6}$$

Gellir ailysgrifennu \frac{5}{-4} fel -\frac{5}{4} drwy echdynnu’r arwydd negatif.

$$400-\left(-\frac{5}{4}\right)+\left(-5\right)^{6}$$

Gwrthwyneb -\frac{5}{4} yw \frac{5}{4}.

$$400+\frac{5}{4}+\left(-5\right)^{6}$$

Troswch y rhif degol 400 i’r ffracsiwn \frac{1600}{4}.

$$\frac{1600}{4}+\frac{5}{4}+\left(-5\right)^{6}$$

Gan fod gan \frac{1600}{4} a \frac{5}{4} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{1600+5}{4}+\left(-5\right)^{6}$$

Adio 1600 a 5 i gael 1605.

$$\frac{1605}{4}+\left(-5\right)^{6}$$

Cyfrifo -5 i bŵer 6 a chael 15625.

$$\frac{1605}{4}+15625$$

Troswch y rhif degol 15625 i’r ffracsiwn \frac{62500}{4}.

$$\frac{1605}{4}+\frac{62500}{4}$$

Gan fod gan \frac{1605}{4} a \frac{62500}{4} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{1605+62500}{4}$$

Adio 1605 a 62500 i gael 64105.

$$\frac{64105}{4}$$

Ffactor

$$\frac{5 \cdot 12821}{2 ^ {2}} = 16026\frac{1}{4} = 16026.25$$