2-https://wordwall.net/es/resource/17265960/numeraci%C3%B3n-hasta-el-40
3-https://wordwall.net/es/resource/17493909/complet%C3%A1-la-serie-num%C3%A9rica
4-https://www.liveworksheets.com/worksheet/es/matematicas/1767429
5-https://www.liveworksheets.com/es/worksheet/es/matematicas/402572
6-https://www.liveworksheets.com/worksheet/es/matematicas/1213133
7-https://www.liveworksheets.com/worksheet/es/matematicas/2230288
8-https://www.liveworksheets.com/worksheet/es/matematicas/1409968
9-https://www.liveworksheets.com/worksheet/es/matematicas/761415
10-https://www.liveworksheets.com/worksheet/es/lengua-espanola/1310689
