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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 274 · 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. 1.43 + 87 =
  2. 2.30 + 41 =
  3. 3.36 + 23 =
  4. 4.82 + 81 =
  5. 5.69 + 66 =
  6. 6.52 + 36 =
  7. 7.45 + 63 =
  8. 8.48 + 14 =
  9. 9.88 + 35 =
  10. 10.49 + 71 =
  11. 11.67 + 79 =
  12. 12.21 + 18 =
  13. 13.67 + 13 =
  14. 14.32 + 38 =
  15. 15.39 + 77 =
  16. 16.77 + 52 =
  17. 17.80 + 81 =
  18. 18.73 + 69 =
  19. 19.54 + 62 =
  20. 20.89 + 79 =
  21. 21.26 + 32 =
  22. 22.84 + 53 =
  23. 23.58 + 22 =
  24. 24.24 + 61 =
  25. 25.70 + 75 =
  26. 26.25 + 37 =
  27. 27.57 + 18 =
  28. 28.23 + 48 =
  29. 29.83 + 21 =
  30. 30.77 + 57 =
  31. 31.25 + 61 =
  32. 32.71 + 57 =
  33. 33.82 + 85 =
  34. 34.87 + 78 =
  35. 35.78 + 35 =
  36. 36.68 + 26 =
  37. 37.67 + 86 =
  38. 38.41 + 51 =
  39. 39.59 + 86 =
  40. 40.59 + 88 =

Answer key

  1. 130
  2. 71
  3. 59
  4. 163
  5. 135
  6. 88
  7. 108
  8. 62
  9. 123
  10. 120
  11. 146
  12. 39
  13. 80
  14. 70
  15. 116
  16. 129
  17. 161
  18. 142
  19. 116
  20. 168
  21. 58
  22. 137
  23. 80
  24. 85
  25. 145
  26. 62
  27. 75
  28. 71
  29. 104
  30. 134
  31. 86
  32. 128
  33. 167
  34. 165
  35. 113
  36. 94
  37. 153
  38. 92
  39. 145
  40. 147

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