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Ages 8–10

Mental addition to 50

Add tens and ones mentally with sums up to 100. Review suitability for your learners before teaching.

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Worksheet StudioMaths practice

Mental addition to 50

Take your time. Show your thinking. You've got this.

Name ____________________Date ______________
  1. 1.0 + 29 = blank
  2. 2.13 + 22 = blank
  3. 3.33 + 49 = blank
  4. 4.32 + 36 = blank
  5. 5.2 + 11 = blank
  6. 6.38 + 27 = blank
  7. 7.23 + 0 = blank
  8. 8.43 + 25 = blank
  9. 9.41 + 40 = blank
  10. 10.25 + 30 = blank
  11. 11.24 + 45 = blank
  12. 12.39 + 21 = blank
One small step. One stronger skill.12 questions · Seed 42
View the answer key
Worksheet StudioAnswer key

Mental addition to 50

Use this page to check your work.

Name ____________________Date ______________
  1. 1.0 + 29 = 29
  2. 2.13 + 22 = 35
  3. 3.33 + 49 = 82
  4. 4.32 + 36 = 68
  5. 5.2 + 11 = 13
  6. 6.38 + 27 = 65
  7. 7.23 + 0 = 23
  8. 8.43 + 25 = 68
  9. 9.41 + 40 = 81
  10. 10.25 + 30 = 55
  11. 11.24 + 45 = 69
  12. 12.39 + 21 = 60
One small step. One stronger skill.12 questions · Seed 42
Worksheet StudioMaths practice

Mental addition to 50

Take your time. Show your thinking. You've got this.

Name ____________________Date ______________
  1. 1.0 + 29 = blank
  2. 2.13 + 22 = blank
  3. 3.33 + 49 = blank
  4. 4.32 + 36 = blank
  5. 5.2 + 11 = blank
  6. 6.38 + 27 = blank
  7. 7.23 + 0 = blank
  8. 8.43 + 25 = blank
  9. 9.41 + 40 = blank
  10. 10.25 + 30 = blank
  11. 11.24 + 45 = blank
  12. 12.39 + 21 = blank
One small step. One stronger skill.12 questions · Seed 42
Worksheet StudioAnswer key

Mental addition to 50

Use this page to check your work.

Name ____________________Date ______________
  1. 1.0 + 29 = 29
  2. 2.13 + 22 = 35
  3. 3.33 + 49 = 82
  4. 4.32 + 36 = 68
  5. 5.2 + 11 = 13
  6. 6.38 + 27 = 65
  7. 7.23 + 0 = 23
  8. 8.43 + 25 = 68
  9. 9.41 + 40 = 81
  10. 10.25 + 30 = 55
  11. 11.24 + 45 = 69
  12. 12.39 + 21 = 60
One small step. One stronger skill.12 questions · Seed 42