Add & Subtract Variables within 100 - Answer Key - Find the Value of the Variable

Sep 30, 2026

Practice worksheet on solving equations with variables using addition and subtraction within 100. It provides 20 items where a variable is determined from simple number equations such as B + 17 = 79, 80 = C + 11, 53-52 = E, and F = 36 + 34, continuing through letters J to Y. The document includes the completed answer key listing each variable’s value.

LanguageEnglish

CategoryExam

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Find the value of the variable

Problems 1-10

Problems 11-20

Add & Subtract Variables within 100 Name: Find the value of the variable. 1) B + 17 = 79 2) 80 = C + 11 3) 53-52 = E 4) F = 36 + 34 5) 85-78 = G 6) H = 95-30 7) 98-J = 79 8) 93 = 99-K 9) 92 = 99-L 10) 91-M = 60 11) 97 = N + 83 12) P = 21 + 55 13) 93 = 68 + Q 14) R + 31 = 35 15) S = 29 + 7 16) 54 = T-27 17) 6 = U-81 18) V-50 = 8 19) W = 87-62 20) Y = 46 + 33 B= C= E= F= G= H= J= K= L= M= N= P= Q= R= S= T= U= V= W= Y= 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Answers Math [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 2 1-10 11-20 95 45 90 40 85 35 80 30 75 25 70 20 65 15 60 10 55 5 50 0 Add & Subtract Variables within 100 Name: Answer Key | Find the value of the variable.
1) B + 17 = 79 B= 62
2) 80 = C + 11 C= 69
3) 53-52 = E E= 1
4) F = 36 + 34 F= 70
5) 85-78 = G G= 7
6) H = 95-30 H= 65
7) 98-J = 79 J= 19
8) 93 = 99-K K= 6
9) 92 = 99-L L= 7
10) 91-M = 60 M= 31
11) 97 = N + 83 N= 14
12) P = 21 + 55 P= 76
13) 93 = 68 + Q Q= 25
14) R + 31 = 35 R= 4
15) S = 29 + 7 S= 36
16) 54 = T-27 T= 81
17) 6 = U-81 U= 87
18) V-50 = 8 V= 58
19) W = 87-62 W= 25
20) Y = 46 + 33 Y= 79 | Answers
1. 62 2. 69 3. 1 4. 70 5. 7 6. 65 7. 19 8. 6 9. 7 10. 31 11. 14 12. 76 13. 25 14. 4 15. 36 16. 81 17. 87 18. 58 19. 25
20. 79 | | --- | --- | Math [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 2 1-10 11-20 95 45 90 40 85 35 80 30 75 25 70 20 65 15 60 10 55 5 50 0 Add & Subtract Variables within 100 Name: Find the value of the 76 62 69 1) B + 17 = 79 2) 80 = C + 11 3) 53-52 = E 4) F = 36 + 34 5) 85-78 = G 6) H = 95-30 7) 98-J = 79 8) 93 = 99-K 9) 92 = 99-L 10) 91-M = 60 11) 97 = N + 83 12) P = 21 + 55 variable. 14 19 7 B= C= E= F= G= H= J= K= L= M= N= P= 70 31 1 65 7 6 Answers 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Math Modified [www.CommonCoreSheets.com](www.CommonCoreSheets.com) 2 1-10 92 11-12 8 83 0 75 67 58 50 42 33 25 17

FAQs

What type of math problems are included in this worksheet?

The worksheet uses addition and subtraction equations to solve for variables within 100. Each problem gives a relationship like B + 17 = 79 and asks for the variable value.

How do you find a variable from an equation on the page?

Use the inverse operation to isolate the variable. For example, if B + 17 = 79, subtract 17 from both sides to get B.

Where can the solutions be found?

The document provides an “Answer Key” section that lists each variable’s solved value for problems 1 through 20.

Sep 30, 2026

Uploaded by PakDamar76