Evaluate
\frac{20}{9}\approx 2.222222222
Factor
\frac{2 ^ {2} \cdot 5}{3 ^ {2}} = 2\frac{2}{9} = 2.2222222222222223
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\begin{array}{l}\phantom{36)}\phantom{1}\\36\overline{)80}\\\end{array}
Use the 1^{st} digit 8 from dividend 80
\begin{array}{l}\phantom{36)}0\phantom{2}\\36\overline{)80}\\\end{array}
Since 8 is less than 36, use the next digit 0 from dividend 80 and add 0 to the quotient
\begin{array}{l}\phantom{36)}0\phantom{3}\\36\overline{)80}\\\end{array}
Use the 2^{nd} digit 0 from dividend 80
\begin{array}{l}\phantom{36)}02\phantom{4}\\36\overline{)80}\\\phantom{36)}\underline{\phantom{}72\phantom{}}\\\phantom{36)9}8\\\end{array}
Find closest multiple of 36 to 80. We see that 2 \times 36 = 72 is the nearest. Now subtract 72 from 80 to get reminder 8. Add 2 to quotient.
\text{Quotient: }2 \text{Reminder: }8
Since 8 is less than 36, stop the division. The reminder is 8. The topmost line 02 is the quotient. Remove all zeros at the start of the quotient to get the actual quotient 2.
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}