Posted on by Maths With MumSubitizing Cards Online Activity Subitizing Cards Online Activity Return to video lesson on Subitizing Press to Generate New Question Share on Google Classroom: What number is this? Check Roman Numerals to 20 Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Pinterest (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)MoreClick to share on Tumblr (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on Skype (Opens in new window)