Datrys (12-4/5)^-2+sqrt{25/16}-2^-1=

$$( 12 - \frac { 4 } { 5 } ) ^ { - 2 } + \sqrt { \frac { 25 } { 16 } } - 2 ^ { - 1 } =$$

Enrhifo

$$\frac{2377}{3136}\approx 0.757971939$$

Camau Ateb

Tynnu \frac{4}{5} o 12 i gael \frac{56}{5}.

$$\left(\frac{56}{5}\right)^{-2}+\sqrt{\frac{25}{16}}-2^{-1}$$

Cyfrifo \frac{56}{5} i bŵer -2 a chael \frac{25}{3136}.

$$\frac{25}{3136}+\sqrt{\frac{25}{16}}-2^{-1}$$

Ailysgrifennu ail isradd y rhaniad \frac{25}{16} fel rhaniad ail israddau \frac{\sqrt{25}}{\sqrt{16}}. Cymryd ail isradd y rhifiadur a'r enwadur.

$$\frac{25}{3136}+\frac{5}{4}-2^{-1}$$

Adio \frac{25}{3136} a \frac{5}{4} i gael \frac{3945}{3136}.

$$\frac{3945}{3136}-2^{-1}$$

Cyfrifo 2 i bŵer -1 a chael \frac{1}{2}.

$$\frac{3945}{3136}-\frac{1}{2}$$

Tynnu \frac{1}{2} o \frac{3945}{3136} i gael \frac{2377}{3136}.

$$\frac{2377}{3136}$$

Ffactor

$$\frac{2377}{2 ^ {6} \cdot 7 ^ {2}} = 0.7579719387755102$$