Datrys 2-3*(1-2/5)?

$$2 - 3 \times ( 1 - \frac { 2 } { 5 } ) ?$$

Enrhifo

$$\frac{1}{5}=0.2$$

Camau Ateb

Troswch y rhif degol 1 i’r ffracsiwn \frac{5}{5}.

$$2-3\left(\frac{5}{5}-\frac{2}{5}\right)$$

Gan fod gan \frac{5}{5} a \frac{2}{5} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$2-3\times \frac{5-2}{5}$$

Tynnu 2 o 5 i gael 3.

$$2-3\times \frac{3}{5}$$

Mynegwch 3\times \frac{3}{5} fel ffracsiwn unigol.

$$2-\frac{3\times 3}{5}$$

Lluosi 3 a 3 i gael 9.

$$2-\frac{9}{5}$$

Troswch y rhif degol 2 i’r ffracsiwn \frac{10}{5}.

$$\frac{10}{5}-\frac{9}{5}$$

Gan fod gan \frac{10}{5} a \frac{9}{5} yr un dynodydd, tynnwch nhw drwy dynnu eu rhifiaduron.

$$\frac{10-9}{5}$$

Tynnu 9 o 10 i gael 1.

$$\frac{1}{5}$$

Ffactor

$$\frac{1}{5} = 0.2$$