Thailand · Grade 3 · Practice Sheet 20

1. 1.

   What is double 3?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   There are 5 bags with 8 apples in each bag. How many apples are there in total?

   Formula:Multiplication as Repeated Addition

   $\text{total} = \text{groups} \times \text{size}$

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3. 3.

   Add 9 + 11 + 10.

   Formula:Addition of Three Numbers

   $\text{sum} = a + b + c$

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4. 4.

   Fill in the missing number: 2 + ___ = 9.

   Formula:Missing Addend

   $b = \text{total} - a$

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5. 5.

   What is double 23?

   Formula:Doubling

   $d = 2 \times n$

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6. 6.

   Fill in the missing number: 11 + ___ = 17.

   Formula:Missing Addend

   $b = \text{total} - a$

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7. 7.

   Add 25 and 12.

   Formula:Addition

   $\text{sum} = a + b$

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8. 8.

   Continue the pattern by counting in 3s: 0, 3, ___

   Formula:Skip Counting

   $\text{next} = \text{term} + \text{step}$

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9. 9.

   How many tens are there in the number 36?

   Formula:Place Value

   $\text{value} = \text{tens} \times 10 + \text{ones}$

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10. 10.

    What is 6 × 2?

    Formula:Multiplication (Times Tables)

    $\text{product} = a \times b$

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11. 11.

    There are 3 bags with 3 apples in each bag. How many apples are there in total?

    Formula:Multiplication as Repeated Addition

    $\text{total} = \text{groups} \times \text{size}$

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12. 12.

    12 sweets are shared equally among 2 children. How many does each child get?

    Formula:Division (Equal Sharing)

    $\text{each} = \text{total} \div \text{groups}$

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13. 13.

    Fill in the missing number: 15 + ___ = 22.

    Formula:Missing Addend

    $b = \text{total} - a$

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14. 14.

    Continue the pattern by counting in 10s: 10, 20, ___

    Formula:Skip Counting

    $\text{next} = \text{term} + \text{step}$

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15. 15.

    Add 31 and 33.

    Formula:Addition

    $\text{sum} = a + b$

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16. 16.

    You have ฿8 and ฿8. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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17. 17.

    21 sweets are shared equally among 3 children. How many does each child get?

    Formula:Division (Equal Sharing)

    $\text{each} = \text{total} \div \text{groups}$

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18. 18.

    You have ฿3 and ฿1. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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19. 19.

    How many tens are there in the number 40?

    Formula:Place Value

    $\text{value} = \text{tens} \times 10 + \text{ones}$

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20. 20.

    Add 10 + 13 + 4.

    Formula:Addition of Three Numbers

    $\text{sum} = a + b + c$

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