Halloween
Unidad 2
Operaciones combinadas
https://www.liveworksheets.com/worksheet/es/matematicas/1497884
https://www.liveworksheets.com/worksheet/es/math-addition-and-subtraction/145019
https://www.liveworksheets.com/worksheet/es/matematicas/1530675
https://www.liveworksheets.com/worksheet/es/matematicas/1829257
Estimar
https://www.liveworksheets.com/worksheet/es/math-addition-and-subtraction/428858
https://www.liveworksheets.com/worksheet/es/math-addition-and-subtraction/438477
Unidad 1
Descomposición de números
https://www.liveworksheets.com/worksheet/es/matematicas/1743402
https://www.liveworksheets.com/worksheet/es/matematicas/549193
https://www.liveworksheets.com/worksheet/es/matematicas/568332
Números romanos
https://www.liveworksheets.com/worksheet/es/math-algebra/166147
https://www.liveworksheets.com/worksheet/es/matematicas/396405
https://www.liveworksheets.com/worksheet/es/math-algebra/388779
Aproximaciones
https://www.liveworksheets.com/worksheet/es/math-place-value/270910