Evaluate
6.4
Factor
\frac{2 ^ {5}}{5} = 6\frac{2}{5} = 6.4
Share
Copied to clipboard
\frac{\left(3\times 5+1\right)\times 5}{5\times 2}\times 0.8
Divide \frac{3\times 5+1}{5} by \frac{2}{5} by multiplying \frac{3\times 5+1}{5} by the reciprocal of \frac{2}{5}.
\frac{1+3\times 5}{2}\times 0.8
Cancel out 5 in both numerator and denominator.
\frac{1+15}{2}\times 0.8
Multiply 3 and 5 to get 15.
\frac{16}{2}\times 0.8
Add 1 and 15 to get 16.
8\times 0.8
Divide 16 by 2 to get 8.
6.4
Multiply 8 and 0.8 to get 6.4.
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}