Thailand · Grade 1 · Practice Sheet 41

1. 1.

   Fill in the missing number: 4 + ___ = 13.

   Formula:Missing Addend

   $b = \text{total} - a$

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2. 2.

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

   Formula:Skip Counting

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

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3. 3.

   What is 9 + 7?

   Formula:Addition

   $\text{sum} = a + b$

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4. 4.

   You have ฿2 and ฿7. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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5. 5.

   Add 18 and 11.

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   You have ฿4 and ฿9. 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 2s: 8, 10, ___

   Formula:Skip Counting

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

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8. 8.

   What is 8 + 4?

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   Add 45 and 48.

   Formula:Addition

   $\text{sum} = a + b$

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10. 10.

    Fill in the missing number: 4 + ___ = 19.

    Formula:Missing Addend

    $b = \text{total} - a$

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11. 11.

    Continue the pattern by counting in 2s: 4, 6, ___

    Formula:Skip Counting

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

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12. 12.

    Add 81 and 49.

    Formula:Addition

    $\text{sum} = a + b$

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13. 13.

    What is 8 + 6?

    Formula:Addition

    $\text{sum} = a + b$

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14. 14.

    Add 82 and 47.

    Formula:Addition

    $\text{sum} = a + b$

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15. 15.

    What is 7 + 1?

    Formula:Addition

    $\text{sum} = a + b$

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16. 16.

    Add 20 and 29.

    Formula:Addition

    $\text{sum} = a + b$

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17. 17.

    What is double 8?

    Formula:Doubling

    $d = 2 \times n$

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18. 18.

    Continue the pattern by counting in 5s: 10, 15, ___

    Formula:Skip Counting

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

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19. 19.

    You have ฿5 and ฿9. 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: 15 + ___ = 18.

    Formula:Missing Addend

    $b = \text{total} - a$

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