Enrhifo
\frac{39}{5}=7.8
Ffactor
\frac{3 \cdot 13}{5} = 7\frac{4}{5} = 7.8
Rhannu
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\frac{3}{5}+3\times \frac{12}{5}
Rhannwch 3 â \frac{5}{12} drwy luosi 3 â chilydd \frac{5}{12}.
\frac{3}{5}+\frac{3\times 12}{5}
Mynegwch 3\times \frac{12}{5} fel ffracsiwn unigol.
\frac{3}{5}+\frac{36}{5}
Lluosi 3 a 12 i gael 36.
\frac{3+36}{5}
Gan fod gan \frac{3}{5} a \frac{36}{5} yr un dynodydd, adiwch nhw drwy adio eu rhifiaduron.
\frac{39}{5}
Adio 3 a 36 i gael 39.
Enghreifftiau
Hafaliad cwadratig
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y = 3x + 4
Rhifyddeg
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\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Gwahaniaethu
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Terfynau
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}