To find the missing number in each equation, we need to figure out what number adds to the given number to make 10. We can do this by counting up from the given number to 10, or by subtracting the given number from 10.
Here is the step-by-step solution for each problem:
Left Column:
1. $2 + \_\_ = 10$: Count up from 2 to 10 (3, 4, 5, 6, 7, 8). The answer is
8.
2. $3 + \_\_ = 10$: Count up from 3 to 10 (4, 5, 6, 7). The answer is
7.
3. $\_\_ + 3 = 10$: This is the same as $3 + \_\_ = 10$. The answer is
7.
4. $3 + \_\_ = 10$: Same as above. The answer is
7.
5. $\_\_ + 5 = 10$: Count up from 5 to 10 (6, 7, 8, 9, 10). The answer is
5.
6. $7 + \_\_ = 10$: Count up from 7 to 10 (8, 9, 10). The answer is
3.
7. $1 + \_\_ = 10$: Count up from 1 to 10. The answer is
9.
8. $\_\_ + 2 = 10$: Same as $2 + \_\_ = 10$. The answer is
8.
9. $\_\_ + 1 = 10$: Same as $1 + \_\_ = 10$. The answer is
9.
10. $\_\_ + 6 = 10$: Count up from 6 to 10 (7, 8, 9, 10). The answer is
4.
Right Column:
11. $7 + \_\_ = 10$: Count up from 7 to 10. The answer is
3.
12. $\_\_ + 8 = 10$: Count up from 8 to 10 (9, 10). The answer is
2.
13. $8 + \_\_ = 10$: Same as above. The answer is
2.
14. $\_\_ + 2 = 10$: Count up from 2 to 10. The answer is
8.
15. $\_\_ + 2 = 10$: Same as above. The answer is
8.
16. $3 + \_\_ = 10$: Count up from 3 to 10. The answer is
7.
17. $\_\_ + 9 = 10$: Count up from 9 to 10. The answer is
1.
18. $\_\_ + 8 = 10$: Count up from 8 to 10. The answer is
2.
19. $\_\_ + 6 = 10$: Count up from 6 to 10. The answer is
4.
20. $\_\_ + 7 = 10$: Count up from 7 to 10. The answer is
3.
Final Answer:
Left Column:
2 +
8 = 10
3 +
7 = 10
7 + 3 = 10
3 +
7 = 10
5 + 5 = 10
7 +
3 = 10
1 +
9 = 10
8 + 2 = 10
9 + 1 = 10
4 + 6 = 10
Right Column:
7 +
3 = 10
2 + 8 = 10
8 +
2 = 10
8 + 2 = 10
8 + 2 = 10
3 +
7 = 10
1 + 9 = 10
2 + 8 = 10
4 + 6 = 10
3 + 7 = 10
Parent Tip: Review the logic above to help your child master the concept of complements of 10 worksheet.
