Colombia · Grado 2 · Practice Sheet 30

1. 1.

   What is double 20?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   Subtract 12 from 44.

   Formula:Subtraction

   $\text{difference} = a - b$

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3. 3.

   How many tens are there in the number 17?

   Formula:Place Value

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

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4. 4.

   What is 7 + 5?

   Formula:Addition

   $\text{sum} = a + b$

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5. 5.

   Add 20 and 20.

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   Add 18 + 5 + 16.

   Formula:Addition of Three Numbers

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

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7. 7.

   There are 5 bags with 6 apples in each bag. How many apples are there in total?

   Formula:Multiplication as Repeated Addition

   $\text{total} = \text{groups} \times \text{size}$

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8. 8.

   Add 67 and 28.

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   Subtract 57 from 63.

   Formula:Subtraction

   $\text{difference} = a - b$

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10. 10.

    What is double 3?

    Formula:Doubling

    $d = 2 \times n$

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11. 11.

    Subtract 52 from 63.

    Formula:Subtraction

    $\text{difference} = a - b$

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12. 12.

    What is double 2?

    Formula:Doubling

    $d = 2 \times n$

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13. 13.

    How many tens are there in the number 67?

    Formula:Place Value

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

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14. 14.

    Add 5 + 10 + 10.

    Formula:Addition of Three Numbers

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

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15. 15.

    What is 3 + 1?

    Formula:Addition

    $\text{sum} = a + b$

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16. 16.

    Subtract 34 from 73.

    Formula:Subtraction

    $\text{difference} = a - b$

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17. 17.

    Add 22 and 36.

    Formula:Addition

    $\text{sum} = a + b$

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18. 18.

    What is 17 − 9?

    Formula:Subtraction

    $\text{difference} = a - b$

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19. 19.

    Fill in the missing number: 4 + ___ = 12.

    Formula:Missing Addend

    $b = \text{total} - a$

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20. 20.

    Continue the pattern by counting in 3s: 6, 9, ___

    Formula:Skip Counting

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

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