Cambodia · Grade 1 · Practice Sheet 8

1. 1.

   Fill in the missing number: 2 + ___ = 4.

   Formula:Missing Addend

   $b = \text{total} - a$

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2. 2.

   What is 2 + 5?

   Formula:Addition

   $\text{sum} = a + b$

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3. 3.

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

   Formula:Missing Addend

   $b = \text{total} - a$

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4. 4.

   You have ៛ 3 and ៛ 3. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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5. 5.

   What is 1 + 7?

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   Add 38 and 11.

   Formula:Addition

   $\text{sum} = a + b$

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7. 7.

   What is double 8?

   Formula:Doubling

   $d = 2 \times n$

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8. 8.

   What is 14 − 2?

   Formula:Subtraction

   $\text{difference} = a - b$

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9. 9.

   What is 2 + 4?

   Formula:Addition

   $\text{sum} = a + b$

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10. 10.

    Add 46 and 40.

    Formula:Addition

    $\text{sum} = a + b$

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11. 11.

    What is double 3?

    Formula:Doubling

    $d = 2 \times n$

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12. 12.

    Add 14 and 55.

    Formula:Addition

    $\text{sum} = a + b$

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13. 13.

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

    Formula:Skip Counting

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

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14. 14.

    Add 65 and 21.

    Formula:Addition

    $\text{sum} = a + b$

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15. 15.

    What is 7 + 8?

    Formula:Addition

    $\text{sum} = a + b$

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16. 16.

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

    Formula:Adding Money

    $\text{total} = a + b$

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17. 17.

    Continue the pattern by counting in 5s: 15, 20, ___

    Formula:Skip Counting

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

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18. 18.

    You have ៛ 9 and ៛ 7. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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19. 19.

    Continue the pattern by counting in 10s: 30, 40, ___

    Formula:Skip Counting

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

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20. 20.

    What is 2 + 5?

    Formula:Addition

    $\text{sum} = a + b$

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