Numeral systems
- Egyptian numeral system
- Roman numeral system
- Decimal system
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Reading and writing numbers. Large numbers
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Rounding numbers
- Types of decimal number
- Transforming fractions into decimals
- Transforming decimals into fractions
- Using calculator
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Operations with numbers
Combined operations
- Exact and approximate amounts
- Significant figures
- Managing errors
Natural numbers problems
Recursos interactivos : Anaya digital u1
