Vietnam · Grade 3 · Practice Sheet 17

1. 1.

   What is double 10?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   You have VND 1 and VND 4. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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3. 3.

   How many tens are there in the number 39?

   Formula:Place Value

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

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4. 4.

   What is double 8?

   Formula:Doubling

   $d = 2 \times n$

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5. 5.

   Subtract 65 from 78.

   Formula:Subtraction

   $\text{difference} = a - b$

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6. 6.

   How many tens are there in the number 14?

   Formula:Place Value

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

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7. 7.

   Add 6 + 13 + 18.

   Formula:Addition of Three Numbers

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

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8. 8.

   Add 23 and 57.

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   Continue the pattern by counting in 2s: 2, 4, ___

   Formula:Skip Counting

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

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10. 10.

    There are 3 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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11. 11.

    Add 79 and 26.

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    There are 6 bags with 7 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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13. 13.

    Fill in the missing number: 13 + ___ = 16.

    Formula:Missing Addend

    $b = \text{total} - a$

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14. 14.

    What is double 22?

    Formula:Doubling

    $d = 2 \times n$

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15. 15.

    How many tens are there in the number 71?

    Formula:Place Value

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

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16. 16.

    What is 7 × 2?

    Formula:Multiplication (Times Tables)

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

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17. 17.

    Fill in the missing number: 6 + ___ = 11.

    Formula:Missing Addend

    $b = \text{total} - a$

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18. 18.

    What is 9 × 7?

    Formula:Multiplication (Times Tables)

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

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19. 19.

    Add 10 + 4 + 11.

    Formula:Addition of Three Numbers

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

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20. 20.

    16 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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