South Korea · Grade 1 · Practice Sheet 4

1. 1.

   Add 83 and 40.

   Formula:Addition

   $\text{sum} = a + b$

   View formula →
2. 2.

   What is 10 − 5?

   Formula:Subtraction

   $\text{difference} = a - b$

   View formula →
3. 3.

   Fill in the missing number: 7 + ___ = 14.

   Formula:Missing Addend

   $b = \text{total} - a$

   View formula →
4. 4.

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

   Formula:Skip Counting

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

   View formula →
5. 5.

   What is 8 − 3?

   Formula:Subtraction

   $\text{difference} = a - b$

   View formula →
6. 6.

   What is double 20?

   Formula:Doubling

   $d = 2 \times n$

   View formula →
7. 7.

   Add 55 and 57.

   Formula:Addition

   $\text{sum} = a + b$

   View formula →
8. 8.

   Fill in the missing number: 6 + ___ = 9.

   Formula:Missing Addend

   $b = \text{total} - a$

   View formula →
9. 9.

   What is 2 + 2?

   Formula:Addition

   $\text{sum} = a + b$

   View formula →
10. 10.

    Add 64 and 13.

    Formula:Addition

    $\text{sum} = a + b$

    View formula →
11. 11.

    Fill in the missing number: 7 + ___ = 16.

    Formula:Missing Addend

    $b = \text{total} - a$

    View formula →
12. 12.

    Add 51 and 49.

    Formula:Addition

    $\text{sum} = a + b$

    View formula →
13. 13.

    What is double 18?

    Formula:Doubling

    $d = 2 \times n$

    View formula →
14. 14.

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

    Formula:Skip Counting

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

    View formula →
15. 15.

    What is double 14?

    Formula:Doubling

    $d = 2 \times n$

    View formula →
16. 16.

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

    Formula:Skip Counting

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

    View formula →
17. 17.

    Add 40 and 6.

    Formula:Addition

    $\text{sum} = a + b$

    View formula →
18. 18.

    What is 16 − 6?

    Formula:Subtraction

    $\text{difference} = a - b$

    View formula →
19. 19.

    What is 7 + 1?

    Formula:Addition

    $\text{sum} = a + b$

    View formula →
20. 20.

    Add 59 and 9.

    Formula:Addition

    $\text{sum} = a + b$

    View formula →

© FormulaWon — formulawon.app · Answers & step-by-step working available on the solutions sheet.