Here are the solutions to the addition problems. To find a missing number in an addition sentence, you can use subtraction.
* If the problem is
Number + Missing = Total, subtract the Number from the Total.
* If the problem is
Missing + Number = Total, subtract the Number from the Total.
* If the problem is
Number + Number = Missing, just add them together.
Step-by-step calculations:
1. $1,170 - 383 = 787$
2. $2,661 - 1,798 = 863$
3. $4,776 - 4,299 = 477$
4. $17,968 - 9,964 = 8,004$
5. $9,924 - 525 = 9,399$
6. $3,423 + 585 = 4,008$
7. $2,599 - 2,093 = 506$
8. $8,788 + 215 = 9,003$
9. $12,998 - 4,112 = 8,886$
10. $5,884 + 3,843 = 9,727$
11. $1,389 - 993 = 396$
12. $1,650 - 863 = 787$
13. $1,737 - 835 = 902$
14. $10,147 - 633 = 9,514$
15. $5,917 - 5,278 = 639$
16. $15,092 - 7,158 = 7,934$
17. $592 - 362 = 230$
18. $2,105 - 651 = 1,454$
19. $6,147 + 3,312 = 9,459$
20. $3,234 - 217 = 3,017$
Final Answer:
1. 787
2. 863
3. 477
4. 8,004
5. 9,399
6. 4,008
7. 506
8. 9,003
9. 8,886
10. 9,727
11. 396
12. 787
13. 902
14. 9,514
15. 639
16. 7,934
17. 230
18. 1,454
19. 9,459
20. 3,017
Parent Tip: Review the logic above to help your child master the concept of missing math worksheet adding.
