Evaluate
57.5
Factor
\frac{5 \cdot 23}{2} = 57\frac{1}{2} = 57.5
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18+6+2+3+2+1+2+5+2+4+3+4+3+2.5
Add 10 and 8 to get 18.
24+2+3+2+1+2+5+2+4+3+4+3+2.5
Add 18 and 6 to get 24.
26+3+2+1+2+5+2+4+3+4+3+2.5
Add 24 and 2 to get 26.
29+2+1+2+5+2+4+3+4+3+2.5
Add 26 and 3 to get 29.
31+1+2+5+2+4+3+4+3+2.5
Add 29 and 2 to get 31.
32+2+5+2+4+3+4+3+2.5
Add 31 and 1 to get 32.
34+5+2+4+3+4+3+2.5
Add 32 and 2 to get 34.
39+2+4+3+4+3+2.5
Add 34 and 5 to get 39.
41+4+3+4+3+2.5
Add 39 and 2 to get 41.
45+3+4+3+2.5
Add 41 and 4 to get 45.
48+4+3+2.5
Add 45 and 3 to get 48.
52+3+2.5
Add 48 and 4 to get 52.
55+2.5
Add 52 and 3 to get 55.
57.5
Add 55 and 2.5 to get 57.5.
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}