Datrys 31/10*3/10+1/5div1/20=?

$$\frac { 31 } { 10 } \times \frac { 3 } { 10 } + \frac { 1 } { 5 } \div \frac { 1 } { 20 } = ?$$

Enrhifo

$$\frac{493}{100}=4.93$$

Camau Ateb

Lluoswch \frac{31}{10} â \frac{3}{10} drwy luosi'r rhifiadur â’r rhifiadur a'r enwadur â’r enwadur.

$$\frac{31\times 3}{10\times 10}+\frac{\frac{1}{5}}{\frac{1}{20}}$$

Gwnewch y gwaith lluosi yn y ffracsiwn \frac{31\times 3}{10\times 10}.

$$\frac{93}{100}+\frac{\frac{1}{5}}{\frac{1}{20}}$$

Rhannwch \frac{1}{5} â \frac{1}{20} drwy luosi \frac{1}{5} â chilydd \frac{1}{20}.

$$\frac{93}{100}+\frac{1}{5}\times 20$$

Lluosi \frac{1}{5} a 20 i gael \frac{20}{5}.

$$\frac{93}{100}+\frac{20}{5}$$

Rhannu 20 â 5 i gael 4.

$$\frac{93}{100}+4$$

Troswch y rhif degol 4 i’r ffracsiwn \frac{400}{100}.

$$\frac{93}{100}+\frac{400}{100}$$

Gan fod gan \frac{93}{100} a \frac{400}{100} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{93+400}{100}$$

Adio 93 a 400 i gael 493.

$$\frac{493}{100}$$

Ffactor

$$\frac{17 \cdot 29}{2 ^ {2} \cdot 5 ^ {2}} = 4\frac{93}{100} = 4.93$$