Colombia · Grado 1 · Practice Sheet 15

1. 1.

   Continue the pattern by counting in 3s: 12, 15, ___

   Formula:Skip Counting

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

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2. 2.

   What is 10 − 3?

   Formula:Subtraction

   $\text{difference} = a - b$

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3. 3.

   Fill in the missing number: 12 + ___ = 24.

   Formula:Missing Addend

   $b = \text{total} - a$

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4. 4.

   What is double 22?

   Formula:Doubling

   $d = 2 \times n$

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5. 5.

   What is 1 + 5?

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   What is double 12?

   Formula:Doubling

   $d = 2 \times n$

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7. 7.

   Continue the pattern by counting in 3s: 0, 3, ___

   Formula:Skip Counting

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

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8. 8.

   Fill in the missing number: 4 + ___ = 9.

   Formula:Missing Addend

   $b = \text{total} - a$

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9. 9.

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

   Formula:Skip Counting

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

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10. 10.

    What is double 25?

    Formula:Doubling

    $d = 2 \times n$

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11. 11.

    Add 24 and 53.

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    What is 10 − 9?

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

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

    Formula:Missing Addend

    $b = \text{total} - a$

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14. 14.

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

    Formula:Skip Counting

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

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15. 15.

    What is 4 + 9?

    Formula:Addition

    $\text{sum} = a + b$

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16. 16.

    Add 34 and 18.

    Formula:Addition

    $\text{sum} = a + b$

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17. 17.

    What is 18 − 6?

    Formula:Subtraction

    $\text{difference} = a - b$

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18. 18.

    Continue the pattern by counting in 3s: 12, 15, ___

    Formula:Skip Counting

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

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19. 19.

    What is 8 + 5?

    Formula:Addition

    $\text{sum} = a + b$

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20. 20.

    Fill in the missing number: 12 + ___ = 18.

    Formula:Missing Addend

    $b = \text{total} - a$

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