document.write( "Question 163177: 3/18 + 6/17= and -16/40+(-13/20) \n" ); document.write( "

Algebra.Com's Answer #120322 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
When adding and subtracting fractions you need to have the same denominators.
\n" ); document.write( "Make the denominators 17*18.
\n" ); document.write( " $\"3%2F18+%2B+6%2F17=%283%2F18%29%2817%2F17%29%2B%286%2F17%29%2818%2F18%29\"$
\n" ); document.write( " $\"3%2F18+%2B+6%2F17=%283%2A17%29%2F%2817%2A18%29%2B%286%2A18%29%2F%2817%2A18%29\"$
\n" ); document.write( " $\"3%2F18+%2B+6%2F17=51%2F%2817%2A18%29%2B108%2F%2817%2A18%29\"$
\n" ); document.write( " $\"3%2F18+%2B+6%2F17=159%2F%2817%2A18%29\"$
\n" ); document.write( " $\"3%2F18+%2B+6%2F17=%2853%2Across%283%29%29%2F%2817%2A6%2Across%283%29%29\"$
\n" ); document.write( " $\"3%2F18+%2B+6%2F17=%2853%29%2F%28102%29\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "Make the denominators 40.
\n" ); document.write( " $\"-16%2F40%2B%28-13%2F20%29=-16%2F40%2B%28-13%2F20%29%282%2F2%29\"$
\n" ); document.write( " $\"-16%2F40%2B%28-13%2F20%29=-16%2F40%2B%28-26%2F40%29\"$
\n" ); document.write( " $\"-16%2F40%2B%28-13%2F20%29=-42%2F40\"$
\n" ); document.write( " $\"-16%2F40%2B%28-13%2F20%29=-21%2F20\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );