Evaluate
20
Factor
5\times 2^{2}
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2.5+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25
Add 1.25 and 1.25 to get 2.5.
3.75+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25
Add 2.5 and 1.25 to get 3.75.
5+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25
Add 3.75 and 1.25 to get 5.
6.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25
Add 5 and 1.25 to get 6.25.
7.5+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25
Add 6.25 and 1.25 to get 7.5.
8.75+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25
Add 7.5 and 1.25 to get 8.75.
10+1.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25
Add 8.75 and 1.25 to get 10.
11.25+1.25+1.25+1.25+1.25+1.25+1.25+1.25
Add 10 and 1.25 to get 11.25.
12.5+1.25+1.25+1.25+1.25+1.25+1.25
Add 11.25 and 1.25 to get 12.5.
13.75+1.25+1.25+1.25+1.25+1.25
Add 12.5 and 1.25 to get 13.75.
15+1.25+1.25+1.25+1.25
Add 13.75 and 1.25 to get 15.
16.25+1.25+1.25+1.25
Add 15 and 1.25 to get 16.25.
17.5+1.25+1.25
Add 16.25 and 1.25 to get 17.5.
18.75+1.25
Add 17.5 and 1.25 to get 18.75.
20
Add 18.75 and 1.25 to get 20.
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}