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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 9 · 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. 1.30 + 34 =
  2. 2.30 + 22 =
  3. 3.59 + 15 =
  4. 4.53 + 34 =
  5. 5.53 + 49 =
  6. 6.38 + 67 =
  7. 7.57 + 31 =
  8. 8.24 + 37 =
  9. 9.74 + 12 =
  10. 10.71 + 51 =
  11. 11.75 + 44 =
  12. 12.41 + 29 =
  13. 13.41 + 75 =
  14. 14.52 + 14 =
  15. 15.39 + 86 =
  16. 16.29 + 13 =
  17. 17.28 + 79 =
  18. 18.49 + 72 =
  19. 19.44 + 65 =
  20. 20.44 + 36 =
  21. 21.33 + 69 =
  22. 22.56 + 27 =
  23. 23.70 + 59 =
  24. 24.33 + 66 =
  25. 25.41 + 61 =
  26. 26.76 + 22 =
  27. 27.28 + 66 =
  28. 28.88 + 37 =
  29. 29.68 + 61 =
  30. 30.35 + 37 =
  31. 31.64 + 85 =
  32. 32.85 + 56 =
  33. 33.86 + 16 =
  34. 34.45 + 72 =
  35. 35.71 + 54 =
  36. 36.76 + 31 =
  37. 37.81 + 39 =
  38. 38.53 + 22 =
  39. 39.37 + 68 =
  40. 40.26 + 53 =

Answer key

  1. 64
  2. 52
  3. 74
  4. 87
  5. 102
  6. 105
  7. 88
  8. 61
  9. 86
  10. 122
  11. 119
  12. 70
  13. 116
  14. 66
  15. 125
  16. 42
  17. 107
  18. 121
  19. 109
  20. 80
  21. 102
  22. 83
  23. 129
  24. 99
  25. 102
  26. 98
  27. 94
  28. 125
  29. 129
  30. 72
  31. 149
  32. 141
  33. 102
  34. 117
  35. 125
  36. 107
  37. 120
  38. 75
  39. 105
  40. 79

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