Ecuador · Grado 1 · Practice Sheet 43

1. 1.

   Add 49 and 53.

   Formula:Addition

   $\text{sum} = a + b$

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2. 2.

   What is double 4?

   Formula:Doubling

   $d = 2 \times n$

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3. 3.

   Add 79 and 52.

   Formula:Addition

   $\text{sum} = a + b$

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4. 4.

   What is 12 − 6?

   Formula:Subtraction

   $\text{difference} = a - b$

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5. 5.

   Continue the pattern by counting in 2s: 2, 4, ___

   Formula:Skip Counting

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

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6. 6.

   You have $1 and $2. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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7. 7.

   Continue the pattern by counting in 10s: 20, 30, ___

   Formula:Skip Counting

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

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8. 8.

   What is 1 + 9?

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   Add 50 and 46.

   Formula:Addition

   $\text{sum} = a + b$

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10. 10.

    What is double 18?

    Formula:Doubling

    $d = 2 \times n$

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11. 11.

    What is 1 + 9?

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    Add 88 and 7.

    Formula:Addition

    $\text{sum} = a + b$

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13. 13.

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

    Formula:Skip Counting

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

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14. 14.

    Fill in the missing number: 15 + ___ = 20.

    Formula:Missing Addend

    $b = \text{total} - a$

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15. 15.

    What is double 9?

    Formula:Doubling

    $d = 2 \times n$

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16. 16.

    Continue the pattern by counting in 10s: 10, 20, ___

    Formula:Skip Counting

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

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17. 17.

    What is double 18?

    Formula:Doubling

    $d = 2 \times n$

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18. 18.

    You have $7 and $7. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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19. 19.

    What is 6 + 8?

    Formula:Addition

    $\text{sum} = a + b$

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20. 20.

    Add 85 and 52.

    Formula:Addition

    $\text{sum} = a + b$

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