Student's book
Teacher's guide
    Unit 1. Numeral systems throughout history
    Glossary. Unit 1

    Video. Natural numbers
    Applying the developing thinking technique to activity 5
    1. Numeral systems (I)
    Video. Numeral systems
    Interactive presentation. Numeral systems

    Numeral systems (I)

    1. Numeral systems (II)
    Numeral systems (II)

    2. Large numbers
    Interactive presentation. Large numbers

    Large numbers (I)

    Large numbers (II)

    3. Rounding natural numbers
    Videotutorial. Rounding natural numbers
    Rounding numbers

    SDG commitment. Target 11.c
    Assessment. Portfolio
    Rounding natural numbers (I)

    Rounding natural numbers (II)

    4. Basic operations with natural numers (I)
    Addition and subtraction with natural numbers

    Mental arithmetic: Subtraction

    Mental arithmetic: Addition

    4. Basic operations with natural numers (II)
    Video. Distributve property
    Mental arithmetic: multiplication

    Multiplication with natural numbers

    4. Basic operations with natural numers (III)
    Mental arithmetic: division

    Division with natural numbers (I)

    Video. Division test
    4. Basic operations with natural numers (IV)
    Division with natural numbers (II)

    5. Expressions with combined operations
    Interactive presentation. Combined operations

    Expressions with combined operations (I)

    Applying the cooperative learning technique to activity 6
    Expressions with combined operations (II)

    Linguistic plan. Argumentative text
    Learn by playing. Natural numbers

    Answer key for the self-assessment. Unit 1
    Unit 1. Self-assessment

    SDG commitment. Target 13.3
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