Evaluate
-\frac{31}{12}\approx -2.583333333
Factor
-\frac{31}{12} = -2\frac{7}{12} = -2.5833333333333335
Quiz
Arithmetic
5 problems similar to:
- 1 \frac { 1 } { 3 } + \frac { 1 } { 4 } + - 1 \frac { 1 } { 2 }
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-\frac{3+1}{3}+\frac{1}{4}-\frac{1\times 2+1}{2}
Multiply 1 and 3 to get 3.
-\frac{4}{3}+\frac{1}{4}-\frac{1\times 2+1}{2}
Add 3 and 1 to get 4.
-\frac{16}{12}+\frac{3}{12}-\frac{1\times 2+1}{2}
Least common multiple of 3 and 4 is 12. Convert -\frac{4}{3} and \frac{1}{4} to fractions with denominator 12.
\frac{-16+3}{12}-\frac{1\times 2+1}{2}
Since -\frac{16}{12} and \frac{3}{12} have the same denominator, add them by adding their numerators.
-\frac{13}{12}-\frac{1\times 2+1}{2}
Add -16 and 3 to get -13.
-\frac{13}{12}-\frac{2+1}{2}
Multiply 1 and 2 to get 2.
-\frac{13}{12}-\frac{3}{2}
Add 2 and 1 to get 3.
-\frac{13}{12}-\frac{18}{12}
Least common multiple of 12 and 2 is 12. Convert -\frac{13}{12} and \frac{3}{2} to fractions with denominator 12.
\frac{-13-18}{12}
Since -\frac{13}{12} and \frac{18}{12} have the same denominator, subtract them by subtracting their numerators.
-\frac{31}{12}
Subtract 18 from -13 to get -31.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
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}