Evaluate
81.3975
Factor
\frac{3 \cdot 10853}{2 ^ {4} \cdot 5 ^ {2}} = 81\frac{159}{400} = 81.3975
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11.1\times 6.45+5.55\times 5.55-21
Subtract 8.55 from 15 to get 6.45.
71.595+5.55\times 5.55-21
Multiply 11.1 and 6.45 to get 71.595.
71.595+30.8025-21
Multiply 5.55 and 5.55 to get 30.8025.
102.3975-21
Add 71.595 and 30.8025 to get 102.3975.
81.3975
Subtract 21 from 102.3975 to get 81.3975.
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}