Revision as of 00:43, 20 June 2012 edit Dmcq (talk \| contribs) Extended confirmed users, Pending changes reviewers 29,599 edits →Quarter square multiplication: remove space ← Previous edit		Revision as of 16:32, 8 August 2012 edit undo Sun Creator (talk \| contribs) Extended confirmed users, Pending changes reviewers 130,141 edits m →Quarter square multiplication: Typo fixing and checking, typos fixed: ,, → , using AWB (8097) Next edit →
Line 235: </math> If {{math\|''x''+''y''}} is odd then {{math\|''x''-''y''}} will also be odd, this means any fraction will cancel out so no accuracy is lost by discarding the remainders. Below is a lookup table of quarter squares with the remainder discarded for the digits 0 through 18,, this allows for the multiplication of numbers up to {{math\|9×9}}. {\| border="1" cellspacing="0" cellpadding="3" style="margin:0 0 0 0.5em; background:#fff; border-collapse:collapse; border-color:#7070090;"

Multiplication algorithm: Difference between revisions