Adunarea+şi+scăderea+numerelor+naturale

> = = @http://www.adaptedmind.com/gradelist.php?grade=3 [] http://www.oercommons.org/ @http://advancedelearning.com/index.php/articles/c32 [] @http://www.educreativ.ro/ @http://www.funbrain.com/ @http://kids.discovery.com/ @http://www.brainpop.com/free_stuff/ @http://www.edutopia.org/grade-level-k-2 @http://www.first-school.ws/INDEX.HTM @http://www.cosmos4kids.com/ @http://www.ixl.com/ @http://www.cut-the-knot.org/ @http://www.romannumerals.co.uk/index.html @http://www.arcademicskillbuilders.com/ @http://www.mylearning.org/ @http://seeingmath.concord.org/sms_interactives.html @http://www.mathsisfun.com/index.htm @http://phet.colorado.edu/en/simulations/category/math @http://www.geogebra.org/cms/en/help ||
 * # =Adunarea şi scăderea cu o trecere peste un singur ordin (al unităţilor/al zecilor/ sau al sutelor) 2=
 * 1) =Legătura dintre adunare şi scădere. Proba adunării şi proba scăderii 1=
 * 2) =Adunarea şi scăderea cu trecere peste ordinul unităţilor şi al zecilor 2=
 * 1) =Recapitulare 1=
 * 2) =Evaluare 1=
 * 3) =Ameliorare/dezvoltare 1= || [[image:ebc-vimamica/arithmetic-screenshot.png width="390" height="255" align="right" caption="Clic pe imagine si lucreaza!" link="@http://phet.colorado.edu/sims/arithmetic/arithmetic_en.html"]] ||
 * = media type="custom" key="12505716" align="right" || ==Resurse educationale deschise:==