Thailand · Grade 3 · Practice Sheet 19

1. 1.

   How many tens are there in the number 39?

   Formula:Place Value

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

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2. 2.

   Add 16 + 2 + 13.

   Formula:Addition of Three Numbers

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

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3. 3.

   Continue the pattern by counting in 5s: 10, 15, ___

   Formula:Skip Counting

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

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4. 4.

   Fill in the missing number: 3 + ___ = 14.

   Formula:Missing Addend

   $b = \text{total} - a$

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5. 5.

   Subtract 63 from 95.

   Formula:Subtraction

   $\text{difference} = a - b$

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6. 6.

   Add 62 and 48.

   Formula:Addition

   $\text{sum} = a + b$

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7. 7.

   Continue the pattern by counting in 2s: 0, 2, ___

   Formula:Skip Counting

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

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8. 8.

   Subtract 26 from 77.

   Formula:Subtraction

   $\text{difference} = a - b$

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9. 9.

   You have ฿5 and ฿6. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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10. 10.

    Subtract 44 from 71.

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    Fill in the missing number: 12 + ___ = 26.

    Formula:Missing Addend

    $b = \text{total} - a$

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12. 12.

    What is half of 50?

    Formula:Halving

    $h = n \div 2$

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13. 13.

    What is 6 × 2?

    Formula:Multiplication (Times Tables)

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

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14. 14.

    You have ฿6 and ฿6. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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15. 15.

    What is double 14?

    Formula:Doubling

    $d = 2 \times n$

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16. 16.

    12 sweets are shared equally among 6 children. How many does each child get?

    Formula:Division (Equal Sharing)

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

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17. 17.

    There are 6 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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18. 18.

    What is half of 50?

    Formula:Halving

    $h = n \div 2$

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19. 19.

    How many tens are there in the number 42?

    Formula:Place Value

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

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20. 20.

    Fill in the missing number: 4 + ___ = 9.

    Formula:Missing Addend

    $b = \text{total} - a$

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