Mexico · Grado 3 · Practice Sheet 27

1. 1.

   Fill in the missing number: 15 + ___ = 17.

   Formula:Missing Addend

   $b = \text{total} - a$

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2. 2.

   There are 4 bags with 5 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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3. 3.

   Fill in the missing number: 8 + ___ = 22.

   Formula:Missing Addend

   $b = \text{total} - a$

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4. 4.

   There are 4 bags with 5 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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5. 5.

   What is double 16?

   Formula:Doubling

   $d = 2 \times n$

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6. 6.

   You have $2 and $8. How much money do you have altogether?

   Formula:Adding Money

   $\text{total} = a + b$

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7. 7.

   Add 57 and 54.

   Formula:Addition

   $\text{sum} = a + b$

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8. 8.

   Subtract 9 from 30.

   Formula:Subtraction

   $\text{difference} = a - b$

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9. 9.

   What is double 15?

   Formula:Doubling

   $d = 2 \times n$

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10. 10.

    Subtract 10 from 33.

    Formula:Subtraction

    $\text{difference} = a - b$

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11. 11.

    Add 2 + 12 + 6.

    Formula:Addition of Three Numbers

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

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12. 12.

    Add 20 and 53.

    Formula:Addition

    $\text{sum} = a + b$

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13. 13.

    What is half of 42?

    Formula:Halving

    $h = n \div 2$

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14. 14.

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

    Formula:Skip Counting

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

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15. 15.

    Add 20 + 12 + 20.

    Formula:Addition of Three Numbers

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

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16. 16.

    What is half of 10?

    Formula:Halving

    $h = n \div 2$

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17. 17.

    Add 31 and 20.

    Formula:Addition

    $\text{sum} = a + b$

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18. 18.

    Subtract 57 from 83.

    Formula:Subtraction

    $\text{difference} = a - b$

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19. 19.

    Add 28 and 36.

    Formula:Addition

    $\text{sum} = a + b$

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20. 20.

    Subtract 78 from 83.

    Formula:Subtraction

    $\text{difference} = a - b$

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