Evaluate
\frac{13}{10}=1.3
Factor
\frac{13}{2 \cdot 5} = 1\frac{3}{10} = 1.3
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\frac{1\times 3}{2\times 5}+\frac{1\times 2+3}{2}\times \frac{2}{5}
Multiply \frac{1}{2} times \frac{3}{5} by multiplying numerator times numerator and denominator times denominator.
\frac{3}{10}+\frac{1\times 2+3}{2}\times \frac{2}{5}
Do the multiplications in the fraction \frac{1\times 3}{2\times 5}.
\frac{3}{10}+\frac{2+3}{2}\times \frac{2}{5}
Multiply 1 and 2 to get 2.
\frac{3}{10}+\frac{5}{2}\times \frac{2}{5}
Add 2 and 3 to get 5.
\frac{3}{10}+1
Cancel out \frac{5}{2} and its reciprocal \frac{2}{5}.
\frac{3}{10}+\frac{10}{10}
Convert 1 to fraction \frac{10}{10}.
\frac{3+10}{10}
Since \frac{3}{10} and \frac{10}{10} have the same denominator, add them by adding their numerators.
\frac{13}{10}
Add 3 and 10 to get 13.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
Arithmetic
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Matrix
\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]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}