1.0Gudleniekshttps://gudlenieks.lv/en/Gudleniekshttps://gudlenieks.lv/en/author/lauzis/rich600338<blockquote class="wp-embedded-content" data-secret="uNsAuc6ODl"><a href="https://gudlenieks.lv/en/subtraction-up-to-20-with-unknowns/">Subtraction up to 20 with unknowns</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://gudlenieks.lv/en/subtraction-up-to-20-with-unknowns/embed/#?secret=uNsAuc6ODl" width="600" height="338" title="“Subtraction up to 20 with unknowns” — Gudlenieks" data-secret="uNsAuc6ODl" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !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); //# sourceURL=https://gudlenieks.lv/wp-includes/js/wp-embed.min.js </script> https://gudlenieks.lv/wp-content/uploads/2023/10/free_pritnables_substraction_up_to_20_with_unknowns.webp19201440Free printable task for children, where the child has to solve simple subtraction arithmetic examples up to twenty. In the tasks, one of the numbers is unknown, the result or the subtractor must be filled in by the child’s calculation. By completing the tasks, the child practices subtraction – arithmetic, […]