Ireland · Year 1 · Practice Sheet 21

1. 1.

   What is 13 − 9?

   Formula:Subtraction

   $\text{difference} = a - b$

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2. 2.

   Fill in the missing number: 3 + ___ = 12.

   Formula:Missing Addend

   $b = \text{total} - a$

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3. 3.

   What is 1 + 9?

   Formula:Addition

   $\text{sum} = a + b$

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4. 4.

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

   Formula:Skip Counting

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

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5. 5.

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

   Formula:Adding Money

   $\text{total} = a + b$

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6. 6.

   Fill in the missing number: 4 + ___ = 6.

   Formula:Missing Addend

   $b = \text{total} - a$

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7. 7.

   Add 30 and 56.

   Formula:Addition

   $\text{sum} = a + b$

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8. 8.

   You have €8 and €9. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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9. 9.

   Continue the pattern by counting in 3s: 9, 12, ___

   Formula:Skip Counting

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

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10. 10.

    What is 4 + 5?

    Formula:Addition

    $\text{sum} = a + b$

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11. 11.

    What is double 24?

    Formula:Doubling

    $d = 2 \times n$

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12. 12.

    What is 6 − 3?

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

    Add 11 and 5.

    Formula:Addition

    $\text{sum} = a + b$

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14. 14.

    You have €6 and €2. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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15. 15.

    Fill in the missing number: 4 + ___ = 13.

    Formula:Missing Addend

    $b = \text{total} - a$

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16. 16.

    What is double 19?

    Formula:Doubling

    $d = 2 \times n$

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17. 17.

    Fill in the missing number: 2 + ___ = 17.

    Formula:Missing Addend

    $b = \text{total} - a$

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18. 18.

    What is double 21?

    Formula:Doubling

    $d = 2 \times n$

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19. 19.

    You have €2 and €4. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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20. 20.

    What is double 2?

    Formula:Doubling

    $d = 2 \times n$

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