Rules for expressions with fractions:
Fractions - use the slash “/” between the numerator and denominator, i.e., for five-hundredths, enter 5/100. If you are using mixed numbers, be sure to leave a single space between the whole and fraction part.The slash separates the numerator (number above a fraction line) and denominator (number below).
Mixed numerals (mixed fractions or mixed numbers) write as non-zero integer separated by one space and fraction i.e., 1 2/3 (having the same sign). An example of a negative mixed fraction: -5 1/2.
Because slash is both signs for fraction line and division, we recommended use colon (:) as the operator of division fractions i.e., 1/2 : 3.
Decimals (decimal numbers) enter with a decimal point . and they are automatically converted to fractions - i.e. 1.45.
The colon : and slash / is the symbol of division. Can be used to divide mixed numbers 1 2/3 : 4 3/8 or can be used for write complex fractions i.e. 1/2 : 1/3.
An asterisk * or × is the symbol for multiplication.
Plus + is addition, minus sign - is subtraction and ()[] is mathematical parentheses.
The exponentiation/power symbol is ^ - for example: (7/8-4/5)^2 = (7/8-4/5)2
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Learn how to use the Algebra Calculator to check your answers to algebra problems.
Example Problem
Solve 2x+3=15.Check Answer
x=6How to Check Your Answer with Algebra Calculator
First go to the Algebra Calculator main page.
Type the following:
- First type the equation 2x+3=15.
- Then type the @ symbol.
- Then type x=6.
Clickable Demo
Try entering 2x+3=15 @ x=6 into the text box.
After you enter the expression, Algebra Calculator will plug x=6 in for the equation 2x+3=15: 2(6)+3 = 15.
The calculator prints 'True' to let you know that the answer is right.
More Examples
Here are more examples of how to check your answers with Algebra Calculator.Feel free to try them now.- For x+6=2x+3, check (correct) solution x=3: x+6=2x+3 @ x=3
- For x+6=2x+3, check (wrong) solution x=2: x+6=2x+3 @ x=2
- For system of equations x+y=8 and y=x+2, check (correct) solution x=3, y=5: x+y=8 and y=x+2 @ x=3, y=5
- For 3xy=18, check (correct) solution x=2, y=3: 3xy=18 @ x=2, y=3