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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 653 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.37 + 58 =
  2. 2.29 + 36 =
  3. 3.21 + 12 =
  4. 4.28 + 25 =
  5. 5.86 + 33 =
  6. 6.83 + 44 =
  7. 7.39 + 23 =
  8. 8.39 + 41 =
  9. 9.67 + 23 =
  10. 10.39 + 37 =
  11. 11.69 + 26 =
  12. 12.39 + 31 =
  13. 13.75 + 32 =
  14. 14.28 + 17 =
  15. 15.22 + 49 =
  16. 16.26 + 31 =
  17. 17.22 + 66 =
  18. 18.68 + 89 =
  19. 19.28 + 79 =
  20. 20.41 + 71 =
  21. 21.41 + 35 =
  22. 22.63 + 72 =
  23. 23.37 + 25 =
  24. 24.41 + 64 =
  25. 25.60 + 55 =
  26. 26.65 + 17 =
  27. 27.85 + 29 =
  28. 28.32 + 86 =
  29. 29.70 + 48 =
  30. 30.25 + 36 =
  31. 31.40 + 44 =
  32. 32.36 + 79 =
  33. 33.87 + 47 =
  34. 34.77 + 61 =
  35. 35.38 + 57 =
  36. 36.25 + 31 =
  37. 37.79 + 37 =
  38. 38.27 + 29 =
  39. 39.67 + 18 =
  40. 40.74 + 21 =

Answer key

  1. 95
  2. 65
  3. 33
  4. 53
  5. 119
  6. 127
  7. 62
  8. 80
  9. 90
  10. 76
  11. 95
  12. 70
  13. 107
  14. 45
  15. 71
  16. 57
  17. 88
  18. 157
  19. 107
  20. 112
  21. 76
  22. 135
  23. 62
  24. 105
  25. 115
  26. 82
  27. 114
  28. 118
  29. 118
  30. 61
  31. 84
  32. 115
  33. 134
  34. 138
  35. 95
  36. 56
  37. 116
  38. 56
  39. 85
  40. 95

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