Portugal · Ano 2 · Practice Sheet 18

1. 1.

   What is double 18?

   Formula:Doubling

   $d = 2 \times n$

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2. 2.

   Continue the pattern by counting in 3s: 12, 15, ___

   Formula:Skip Counting

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

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3. 3.

   What is 11 − 10?

   Formula:Subtraction

   $\text{difference} = a - b$

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4. 4.

   What is half of 12?

   Formula:Halving

   $h = n \div 2$

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5. 5.

   Add 41 and 31.

   Formula:Addition

   $\text{sum} = a + b$

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6. 6.

   What is half of 20?

   Formula:Halving

   $h = n \div 2$

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7. 7.

   Add 16 + 12 + 17.

   Formula:Addition of Three Numbers

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

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8. 8.

   Add 18 and 37.

   Formula:Addition

   $\text{sum} = a + b$

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9. 9.

   What is half of 10?

   Formula:Halving

   $h = n \div 2$

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10. 10.

    What is 17 − 1?

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    What is 6 + 5?

    Formula:Addition

    $\text{sum} = a + b$

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12. 12.

    Add 22 and 29.

    Formula:Addition

    $\text{sum} = a + b$

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13. 13.

    What is 15 − 7?

    Formula:Subtraction

    $\text{difference} = a - b$

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14. 14.

    How many tens are there in the number 44?

    Formula:Place Value

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

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15. 15.

    What is double 20?

    Formula:Doubling

    $d = 2 \times n$

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16. 16.

    What is 15 − 5?

    Formula:Subtraction

    $\text{difference} = a - b$

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17. 17.

    Add 14 + 13 + 13.

    Formula:Addition of Three Numbers

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

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18. 18.

    There are 2 bags with 7 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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19. 19.

    You have €4 and €5. How much money do you have altogether?

    Formula:Adding Money

    $\text{total} = a + b$

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20. 20.

    How many tens are there in the number 85?

    Formula:Place Value

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

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