document.write( "Question 1070098: How to find the sum of even numbers from 2 to 80? \n" ); document.write( "
Algebra.Com's Answer #685200 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! How to find the sum of even numbers from 2 to 80? \n" ); document.write( "----- \n" ); document.write( "2 to 80 --> 40 even numbers. \n" ); document.write( "-- \n" ); document.write( "Use pairs: \n" ); document.write( "2 + 80 = 82 \n" ); document.write( "4 + 78 = 82 \n" ); document.write( "6 + 76 = 82 \n" ); document.write( "etc for 20 pairs \n" ); document.write( "20*82 = 1640 \n" ); document.write( " |