{"version":"1.0","provider_name":"Pittsfield Elementary School","provider_url":"https:\/\/sau51.org\/pes","author_name":"Pittsfield Elementary School","author_url":"https:\/\/sau51.org\/pes","title":"Trade First Subtraction - Pittsfield Elementary School","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"L3g3HNaBB2\"><a href=\"https:\/\/sau51.org\/pes\/2010\/03\/20\/trade-first-subtraction\/\">Trade First Subtraction<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/sau51.org\/pes\/2010\/03\/20\/trade-first-subtraction\/embed\/#?secret=L3g3HNaBB2\" width=\"600\" height=\"338\" title=\"&#8220;Trade First Subtraction&#8221; &#8212; Pittsfield Elementary School\" data-secret=\"L3g3HNaBB2\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\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:\/\/sau51.org\/pes\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"In Everyday Mathematics (EDM) students are introduced to many different methods for subtraction. As they get older, they are introduced to subtraction algorithms. Some are easier to learn, but not as efficient as others. EDM picks one algorithm as its focus algorithm. Focus algorithms are powerful, relatively efficient and easy to learn and understand. The...","thumbnail_url":"https:\/\/sau51.org\/pes\/wp-content\/uploads\/2010\/03\/clip-image002-thumb1.jpg"}