Enlaces
[1] https://www.rmm.cl/portales/222/articulos/restas-una-cifra
[2] http://r.search.yahoo.com/_ylt=A0geKWFBQ4Nbsl0ARAkPxQt.;_ylu=X3oDMTByOHZyb21tBGNvbG8DYmYxBHBvcwMxBHZ0aWQDBHNlYwNzcg--/RV=2/RE=1535357889/RO=10/RU=http%3a%2f%2folimpia-primerciclo.blogspot.com%2f2011%2f10%2ffichas-de-restas.html/RK=2/RS=6Hy56iJnxI.G4oP.4aEznlIZHfg-
[3] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-1.pdf
[4] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-2.pdf
[5] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-3.pdf
[6] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-4.pdf
[7] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-5.pdf
[8] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-6.pdf
[9] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-7.pdf
[10] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-8.pdf
[11] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-9.pdf
[12] http://orientacionandujar.files.wordpress.com/2009/11/retas-con-una-cifra-100-10.pdf