Evaluate
38.9
Factor
\frac{389}{2 \cdot 5} = 38\frac{9}{10} = 38.9
Quiz
Arithmetic
5 problems similar to:
\frac{ 2 \left( 15 \cdot 4+3 \right) }{ 3 } - \frac{ 15.4-3 }{ 4 }
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\frac{2\left(60+3\right)}{3}-\frac{15.4-3}{4}
Multiply 15 and 4 to get 60.
\frac{2\times 63}{3}-\frac{15.4-3}{4}
Add 60 and 3 to get 63.
\frac{126}{3}-\frac{15.4-3}{4}
Multiply 2 and 63 to get 126.
42-\frac{15.4-3}{4}
Divide 126 by 3 to get 42.
42-\frac{12.4}{4}
Subtract 3 from 15.4 to get 12.4.
42-\frac{124}{40}
Expand \frac{12.4}{4} by multiplying both numerator and the denominator by 10.
42-\frac{31}{10}
Reduce the fraction \frac{124}{40} to lowest terms by extracting and canceling out 4.
\frac{420}{10}-\frac{31}{10}
Convert 42 to fraction \frac{420}{10}.
\frac{420-31}{10}
Since \frac{420}{10} and \frac{31}{10} have the same denominator, subtract them by subtracting their numerators.
\frac{389}{10}
Subtract 31 from 420 to get 389.
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}