Let’s solve each equation one by one. We’re looking for the missing number that makes each equation true.
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1. 20 + ___ = 40
What do we add to 20 to get 40?
→ 40 - 20 =
20
2. 4 × ___ = 16
What times 4 equals 16?
→ 16 ÷ 4 =
4
3. 37 - ___ = 25
What do we subtract from 37 to get 25?
→ 37 - 25 =
12
4. 18 + ___ = 30
What added to 18 gives 30?
→ 30 - 18 =
12
5. 6 × ___ = 24
What times 6 is 24?
→ 24 ÷ 6 =
4
6. ___ - 10 = 50
What minus 10 equals 50?
→ 50 + 10 =
60
7. ___ + 25 = 50
What plus 25 equals 50?
→ 50 - 25 =
25
8. ___ × 4 = 16
What times 4 is 16?
→ 16 ÷ 4 =
4
9. ___ - 12 = 24
What minus 12 equals 24?
→ 24 + 12 =
36
10. ___ + 60 = 80
What plus 60 equals 80?
→ 80 - 60 =
20
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Now the second column:
11. 40 + ___ = 80
→ 80 - 40 =
40
12. 5 × ___ = 35
→ 35 ÷ 5 =
7
13. 35 - ___ = 20
→ 35 - 20 =
15
14. 35 + ___ = 70
→ 70 - 35 =
35
15. 11 × ___ = 66
→ 66 ÷ 11 =
6
16. ___ - 30 = 30
→ 30 + 30 =
60
17. ___ + 18 = 48
→ 48 - 18 =
30
18. ___ × 7 = 21
→ 21 ÷ 7 =
3
19. ___ - 20 = 40
→ 40 + 20 =
60
20. ___ + 13 = 26
→ 26 - 13 =
13
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Final Answer:
1. 20
2. 4
3. 12
4. 12
5. 4
6. 60
7. 25
8. 4
9. 36
10. 20
11. 40
12. 7
13. 15
14. 35
15. 6
16. 60
17. 30
18. 3
19. 60
20. 13
Parent Tip: Review the logic above to help your child master the concept of free worksheet algebra.
