Singapore · Grade 3 · Practice Sheet 7

1. 1.

   What is double 18?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   How many tens are there in the number 13?

   Formula:Place Value

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

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3. 3.

   What is half of 4?

   Formula:Halving

   $h = n \div 2$

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4. 4.

   How many tens are there in the number 30?

   Formula:Place Value

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

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5. 5.

   What is double 24?

   Formula:Doubling

   $d = 2 \times n$

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6. 6.

   Subtract 37 from 45.

   Formula:Subtraction

   $\text{difference} = a - b$

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7. 7.

   Fill in the missing number: 8 + ___ = 17.

   Formula:Missing Addend

   $b = \text{total} - a$

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8. 8.

   Add 3 + 16 + 18.

   Formula:Addition of Three Numbers

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

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9. 9.

   What is double 13?

   Formula:Doubling

   $d = 2 \times n$

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10. 10.

    Subtract 64 from 71.

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    How many tens are there in the number 95?

    Formula:Place Value

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

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12. 12.

    You have $2 and $9. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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13. 13.

    How many tens are there in the number 12?

    Formula:Place Value

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

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14. 14.

    Add 59 and 49.

    Formula:Addition

    $\text{sum} = a + b$

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15. 15.

    27 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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16. 16.

    Continue the pattern by counting in 10s: 30, 40, ___

    Formula:Skip Counting

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

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17. 17.

    How many tens are there in the number 50?

    Formula:Place Value

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

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18. 18.

    Add 16 + 11 + 10.

    Formula:Addition of Three Numbers

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

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19. 19.

    How many tens are there in the number 36?

    Formula:Place Value

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

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20. 20.

    Add 18 + 20 + 13.

    Formula:Addition of Three Numbers

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

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