Section outline

  • 13.1 Discover the unknown number by quick addition or subtraction

    Activity 13.1.1

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    Activity 13.1.2

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    Activity 13.1.3

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    Activity 13.1.4

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    Activity 13.1.5

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    Activity 13.1.6

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    I have learnt that:

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    Activity 13.1.7

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    13.2 Finding the missing number in a number sentence with multiplication or division

    Activity 13.2

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    I have learnt that:

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    13.3. Number pattern

    (a) Finding the common difference in a number pattern

    Activity 13.3.1

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    (b) Finding the missing number in the number pattern

    Activity 13.3.2

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    END UNIT ASSESSMENT 13

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