Evaluate
7.7
Factor
\frac{7 \cdot 11}{2 \cdot 5} = 7\frac{7}{10} = 7.7
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\frac{7}{70}\times 7+7
Expand \frac{0.7}{7} by multiplying both numerator and the denominator by 10.
\frac{1}{10}\times 7+7
Reduce the fraction \frac{7}{70} to lowest terms by extracting and canceling out 7.
\frac{7}{10}+7
Multiply \frac{1}{10} and 7 to get \frac{7}{10}.
\frac{7}{10}+\frac{70}{10}
Convert 7 to fraction \frac{70}{10}.
\frac{7+70}{10}
Since \frac{7}{10} and \frac{70}{10} have the same denominator, add them by adding their numerators.
\frac{77}{10}
Add 7 and 70 to get 77.
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}