Datrys 31/10*3/10+7/5div1/20=?

$$\frac { 31 } { 10 } \times \frac { 3 } { 10 } + \frac { 7 } { 5 } \div \frac { 1 } { 20 } = ?$$

Enrhifo

$$\frac{2893}{100}=28.93$$

Camau Ateb

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

$$\frac{31\times 3}{10\times 10}+\frac{\frac{7}{5}}{\frac{1}{20}}$$

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

$$\frac{93}{100}+\frac{\frac{7}{5}}{\frac{1}{20}}$$

Rhannwch \frac{7}{5} â \frac{1}{20} drwy luosi \frac{7}{5} â chilydd \frac{1}{20}.

$$\frac{93}{100}+\frac{7}{5}\times 20$$

Mynegwch \frac{7}{5}\times 20 fel ffracsiwn unigol.

$$\frac{93}{100}+\frac{7\times 20}{5}$$

Lluosi 7 a 20 i gael 140.

$$\frac{93}{100}+\frac{140}{5}$$

Rhannu 140 â 5 i gael 28.

$$\frac{93}{100}+28$$

Troswch y rhif degol 28 i’r ffracsiwn \frac{2800}{100}.

$$\frac{93}{100}+\frac{2800}{100}$$

Gan fod gan \frac{93}{100} a \frac{2800}{100} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.

$$\frac{93+2800}{100}$$

Adio 93 a 2800 i gael 2893.

$$\frac{2893}{100}$$

Ffactor

$$\frac{11 \cdot 263}{2 ^ {2} \cdot 5 ^ {2}} = 28\frac{93}{100} = 28.93$$