Cambodia · Grade 1 · Practice Sheet 37

1. 1.

   Add 69 and 38.

   Formula:Addition

   $\text{sum} = a + b$

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2. 2.

   What is double 11?

   Formula:Doubling

   $d = 2 \times n$

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3. 3.

   What is 11 − 9?

   Formula:Subtraction

   $\text{difference} = a - b$

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4. 4.

   What is double 20?

   Formula:Doubling

   $d = 2 \times n$

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5. 5.

   Fill in the missing number: 5 + ___ = 15.

   Formula:Missing Addend

   $b = \text{total} - a$

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6. 6.

   Add 75 and 6.

   Formula:Addition

   $\text{sum} = a + b$

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7. 7.

   What is 12 − 11?

   Formula:Subtraction

   $\text{difference} = a - b$

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8. 8.

   Fill in the missing number: 11 + ___ = 20.

   Formula:Missing Addend

   $b = \text{total} - a$

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9. 9.

   What is double 11?

   Formula:Doubling

   $d = 2 \times n$

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10. 10.

    Continue the pattern by counting in 3s: 3, 6, ___

    Formula:Skip Counting

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

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11. 11.

    What is 6 + 8?

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    Add 39 and 46.

    Formula:Addition

    $\text{sum} = a + b$

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13. 13.

    Continue the pattern by counting in 5s: 0, 5, ___

    Formula:Skip Counting

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

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14. 14.

    Fill in the missing number: 9 + ___ = 16.

    Formula:Missing Addend

    $b = \text{total} - a$

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15. 15.

    What is 6 − 3?

    Formula:Subtraction

    $\text{difference} = a - b$

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16. 16.

    What is 1 + 3?

    Formula:Addition

    $\text{sum} = a + b$

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17. 17.

    Fill in the missing number: 13 + ___ = 18.

    Formula:Missing Addend

    $b = \text{total} - a$

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18. 18.

    Continue the pattern by counting in 10s: 0, 10, ___

    Formula:Skip Counting

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

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19. 19.

    What is 6 − 1?

    Formula:Subtraction

    $\text{difference} = a - b$

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20. 20.

    Fill in the missing number: 12 + ___ = 19.

    Formula:Missing Addend

    $b = \text{total} - a$

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