{"version":"1.0","provider_name":"sumomath.com","provider_url":"https:\/\/sumomath.com\/content","author_name":"sumomath.com","author_url":"https:\/\/sumomath.com\/content","title":"Abacus Math Program - Lesson 16 - Reverse Double Rod - sumomath.com","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"GJbk7NTuuX\"><a href=\"https:\/\/sumomath.com\/content\/abacus-math-program-lesson-16-reverse-double-rod\/\">Abacus Math Program &#8211; Lesson 16 &#8211; Reverse Double Rod<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/sumomath.com\/content\/abacus-math-program-lesson-16-reverse-double-rod\/embed\/#?secret=GJbk7NTuuX\" width=\"600\" height=\"338\" title=\"&#8220;Abacus Math Program &#8211; Lesson 16 &#8211; Reverse Double Rod&#8221; &#8212; sumomath.com\" data-secret=\"GJbk7NTuuX\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/sumomath.com\/content\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"In&nbsp;Lesson 11&nbsp;we looked at the Forward Double Rod movement for addition problems. Now let&#8217;s take a look at the Reverse Double Rod movement for subtraction. The double rod movement for subtraction is exactly the same as for addition with the only difference using the 10 pair subtraction rule instead. Again we will repeatedly use the","thumbnail_url":"https:\/\/www.sumomath.com\/content\/wp-content\/uploads\/2020\/02\/lesson11example3.png"}