Small practice. Bright discoveries.Explore the free starter collection
worksheetstudio.
Sign in
Back to worksheets
MathsAges 7-9

Missing-value equations

Find the missing value that makes an equation true, then check by substitution. Review suitability for your learners before teaching.

New variationTry interactive challengeBrowse templates
Age band:Ages 7-9Ages 10-12

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 7-9

Missing-value equations

Take your time. Show your thinking.

  1. 1. 10 × x + 5 = 105. Find x.

    LHS=RHS
    10 · 5 · 105 · Missing-value equations

  2. 2. 11 × x + 6 = 127. Find x.

    LHS=RHS
    11 · 6 · 127 · Missing-value equations

  3. 3. 12 × x + 9 = 153. Find x.

    LHS=RHS
    12 · 9 · 153 · Missing-value equations

  4. 4. 2 × x + 2 = 6. Find x.

    LHS=RHS
    2 · 2 · 6 · Missing-value equations

  5. 5. 11 × x + 4 = 125. Find x.

    LHS=RHS
    11 · 4 · 125 · Missing-value equations

  6. 6. 2 × x + 3 = 7. Find x.

    LHS=RHS
    2 · 3 · 7 · Missing-value equations

  7. 7. 7 × x + 9 = 58. Find x.

    LHS=RHS
    7 · 9 · 58 · Missing-value equations

  8. 8. 12 × x + 7 = 151. Find x.

    LHS=RHS
    12 · 7 · 151 · Missing-value equations

  9. 9. 9 × x + 10 = 91. Find x.

    LHS=RHS
    9 · 10 · 91 · Missing-value equations

  10. 10. 8 × x + 2 = 66. Find x.

    LHS=RHS
    8 · 2 · 66 · Missing-value equations

  11. 11. 11 × x + 8 = 129. Find x.

    LHS=RHS
    11 · 8 · 129 · Missing-value equations

  12. 12. 4 × x + 9 = 25. Find x.

    LHS=RHS
    4 · 9 · 25 · Missing-value equations
12 questions · Seed 104736 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9

Missing-value equations

Answers and reasoning. Review before teaching.

  1. 1. 10 × x + 5 = 105. Find x.

    10

    Subtract 5, then divide by 10: x = 10.

  2. 2. 11 × x + 6 = 127. Find x.

    11

    Subtract 6, then divide by 11: x = 11.

  3. 3. 12 × x + 9 = 153. Find x.

    12

    Subtract 9, then divide by 12: x = 12.

  4. 4. 2 × x + 2 = 6. Find x.

    2

    Subtract 2, then divide by 2: x = 2.

  5. 5. 11 × x + 4 = 125. Find x.

    11

    Subtract 4, then divide by 11: x = 11.

  6. 6. 2 × x + 3 = 7. Find x.

    2

    Subtract 3, then divide by 2: x = 2.

  7. 7. 7 × x + 9 = 58. Find x.

    7

    Subtract 9, then divide by 7: x = 7.

  8. 8. 12 × x + 7 = 151. Find x.

    12

    Subtract 7, then divide by 12: x = 12.

  9. 9. 9 × x + 10 = 91. Find x.

    9

    Subtract 10, then divide by 9: x = 9.

  10. 10. 8 × x + 2 = 66. Find x.

    8

    Subtract 2, then divide by 8: x = 8.

  11. 11. 11 × x + 8 = 129. Find x.

    11

    Subtract 8, then divide by 11: x = 11.

  12. 12. 4 × x + 9 = 25. Find x.

    4

    Subtract 9, then divide by 4: x = 4.

12 questions · Seed 104736 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9

Missing-value equations

Take your time. Show your thinking.

  1. 1. 10 × x + 5 = 105. Find x.

    LHS=RHS
    10 · 5 · 105 · Missing-value equations

  2. 2. 11 × x + 6 = 127. Find x.

    LHS=RHS
    11 · 6 · 127 · Missing-value equations

  3. 3. 12 × x + 9 = 153. Find x.

    LHS=RHS
    12 · 9 · 153 · Missing-value equations

  4. 4. 2 × x + 2 = 6. Find x.

    LHS=RHS
    2 · 2 · 6 · Missing-value equations

  5. 5. 11 × x + 4 = 125. Find x.

    LHS=RHS
    11 · 4 · 125 · Missing-value equations

  6. 6. 2 × x + 3 = 7. Find x.

    LHS=RHS
    2 · 3 · 7 · Missing-value equations

  7. 7. 7 × x + 9 = 58. Find x.

    LHS=RHS
    7 · 9 · 58 · Missing-value equations

  8. 8. 12 × x + 7 = 151. Find x.

    LHS=RHS
    12 · 7 · 151 · Missing-value equations

  9. 9. 9 × x + 10 = 91. Find x.

    LHS=RHS
    9 · 10 · 91 · Missing-value equations

  10. 10. 8 × x + 2 = 66. Find x.

    LHS=RHS
    8 · 2 · 66 · Missing-value equations

  11. 11. 11 × x + 8 = 129. Find x.

    LHS=RHS
    11 · 8 · 129 · Missing-value equations

  12. 12. 4 × x + 9 = 25. Find x.

    LHS=RHS
    4 · 9 · 25 · Missing-value equations
12 questions · Seed 104736 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9

Missing-value equations

Answers and reasoning. Review before teaching.

  1. 1. 10 × x + 5 = 105. Find x.

    10

    Subtract 5, then divide by 10: x = 10.

  2. 2. 11 × x + 6 = 127. Find x.

    11

    Subtract 6, then divide by 11: x = 11.

  3. 3. 12 × x + 9 = 153. Find x.

    12

    Subtract 9, then divide by 12: x = 12.

  4. 4. 2 × x + 2 = 6. Find x.

    2

    Subtract 2, then divide by 2: x = 2.

  5. 5. 11 × x + 4 = 125. Find x.

    11

    Subtract 4, then divide by 11: x = 11.

  6. 6. 2 × x + 3 = 7. Find x.

    2

    Subtract 3, then divide by 2: x = 2.

  7. 7. 7 × x + 9 = 58. Find x.

    7

    Subtract 9, then divide by 7: x = 7.

  8. 8. 12 × x + 7 = 151. Find x.

    12

    Subtract 7, then divide by 12: x = 12.

  9. 9. 9 × x + 10 = 91. Find x.

    9

    Subtract 10, then divide by 9: x = 9.

  10. 10. 8 × x + 2 = 66. Find x.

    8

    Subtract 2, then divide by 8: x = 8.

  11. 11. 11 × x + 8 = 129. Find x.

    11

    Subtract 8, then divide by 11: x = 11.

  12. 12. 4 × x + 9 = 25. Find x.

    4

    Subtract 9, then divide by 4: x = 4.

12 questions · Seed 104736 · Age guidance, not curriculum certification