Singapore · Grade 3 · Practice Sheet 23

1. 1.

   Add 17 + 2 + 4.

   Formula:Addition of Three Numbers

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

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2. 2.

   Continue the pattern by counting in 10s: 20, 30, ___

   Formula:Skip Counting

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

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3. 3.

   What is half of 46?

   Formula:Halving

   $h = n \div 2$

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4. 4.

   How many tens are there in the number 79?

   Formula:Place Value

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

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5. 5.

   You have $6 and $3. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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6. 6.

   Subtract 43 from 83.

   Formula:Subtraction

   $\text{difference} = a - b$

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7. 7.

   Fill in the missing number: 3 + ___ = 11.

   Formula:Missing Addend

   $b = \text{total} - a$

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8. 8.

   Add 3 + 13 + 11.

   Formula:Addition of Three Numbers

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

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9. 9.

   What is double 8?

   Formula:Doubling

   $d = 2 \times n$

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10. 10.

    Subtract 16 from 32.

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

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

    Formula:Adding Money

    $\text{total} = a + b$

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12. 12.

    Fill in the missing number: 15 + ___ = 19.

    Formula:Missing Addend

    $b = \text{total} - a$

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13. 13.

    Subtract 43 from 53.

    Formula:Subtraction

    $\text{difference} = a - b$

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14. 14.

    What is double 2?

    Formula:Doubling

    $d = 2 \times n$

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15. 15.

    You have $1 and $2. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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16. 16.

    How many tens are there in the number 31?

    Formula:Place Value

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

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17. 17.

    What is 3 × 9?

    Formula:Multiplication (Times Tables)

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

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18. 18.

    What is half of 6?

    Formula:Halving

    $h = n \div 2$

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19. 19.

    Continue the pattern by counting in 10s: 40, 50, ___

    Formula:Skip Counting

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

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20. 20.

    Add 79 and 31.

    Formula:Addition

    $\text{sum} = a + b$

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