Ecuador · Grado 1 · Practice Sheet 2

1. 1.

   Fill in the missing number: 3 + ___ = 5.

   Formula:Missing Addend

   $b = \text{total} - a$

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2. 2.

   What is double 24?

   Formula:Doubling

   $d = 2 \times n$

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3. 3.

   Fill in the missing number: 12 + ___ = 21.

   Formula:Missing Addend

   $b = \text{total} - a$

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4. 4.

   Add 63 and 47.

   Formula:Addition

   $\text{sum} = a + b$

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5. 5.

   What is 6 + 7?

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   Add 73 and 31.

   Formula:Addition

   $\text{sum} = a + b$

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7. 7.

   What is 11 − 10?

   Formula:Subtraction

   $\text{difference} = a - b$

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8. 8.

   What is 7 + 9?

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   Add 50 and 47.

   Formula:Addition

   $\text{sum} = a + b$

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10. 10.

    What is 13 − 11?

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    What is double 20?

    Formula:Doubling

    $d = 2 \times n$

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12. 12.

    What is 11 − 9?

    Formula:Subtraction

    $\text{difference} = a - b$

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13. 13.

    You have $9 and $2. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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14. 14.

    What is 5 + 8?

    Formula:Addition

    $\text{sum} = a + b$

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15. 15.

    Add 68 and 40.

    Formula:Addition

    $\text{sum} = a + b$

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16. 16.

    What is 5 − 2?

    Formula:Subtraction

    $\text{difference} = a - b$

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17. 17.

    Fill in the missing number: 14 + ___ = 23.

    Formula:Missing Addend

    $b = \text{total} - a$

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18. 18.

    What is double 17?

    Formula:Doubling

    $d = 2 \times n$

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19. 19.

    You have $8 and $4. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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20. 20.

    Fill in the missing number: 4 + ___ = 10.

    Formula:Missing Addend

    $b = \text{total} - a$

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