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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 + 42 = blank
  2. 2.3 + 6 = blank
  3. 3.28 + 27 = blank
  4. 4.8 + 46 = blank
  5. 5.42 + 23 = blank
  6. 6.1 + 11 = blank
  7. 7.10 + 21 = blank
  8. 8.32 + 1 = blank
  9. 9.22 + 39 = blank
  10. 10.34 + 25 = blank
  11. 11.18 + 8 = blank
  12. 12.24 + 19 = blank
One small step. One stronger skill.12 questions · Seed 45
View the answer key
Worksheet StudioAnswer key

Mental addition to 50

Use this page to check your work.

Name ____________________Date ______________
  1. 1.0 + 42 = 42
  2. 2.3 + 6 = 9
  3. 3.28 + 27 = 55
  4. 4.8 + 46 = 54
  5. 5.42 + 23 = 65
  6. 6.1 + 11 = 12
  7. 7.10 + 21 = 31
  8. 8.32 + 1 = 33
  9. 9.22 + 39 = 61
  10. 10.34 + 25 = 59
  11. 11.18 + 8 = 26
  12. 12.24 + 19 = 43
One small step. One stronger skill.12 questions · Seed 45
Worksheet StudioMaths practice

Mental addition to 50

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

Name ____________________Date ______________
  1. 1.0 + 42 = blank
  2. 2.3 + 6 = blank
  3. 3.28 + 27 = blank
  4. 4.8 + 46 = blank
  5. 5.42 + 23 = blank
  6. 6.1 + 11 = blank
  7. 7.10 + 21 = blank
  8. 8.32 + 1 = blank
  9. 9.22 + 39 = blank
  10. 10.34 + 25 = blank
  11. 11.18 + 8 = blank
  12. 12.24 + 19 = blank
One small step. One stronger skill.12 questions · Seed 45
Worksheet StudioAnswer key

Mental addition to 50

Use this page to check your work.

Name ____________________Date ______________
  1. 1.0 + 42 = 42
  2. 2.3 + 6 = 9
  3. 3.28 + 27 = 55
  4. 4.8 + 46 = 54
  5. 5.42 + 23 = 65
  6. 6.1 + 11 = 12
  7. 7.10 + 21 = 31
  8. 8.32 + 1 = 33
  9. 9.22 + 39 = 61
  10. 10.34 + 25 = 59
  11. 11.18 + 8 = 26
  12. 12.24 + 19 = 43
One small step. One stronger skill.12 questions · Seed 45