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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 117 · 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. 1.66 + 21 =
  2. 2.63 + 18 =
  3. 3.70 + 12 =
  4. 4.52 + 57 =
  5. 5.86 + 26 =
  6. 6.36 + 27 =
  7. 7.24 + 24 =
  8. 8.22 + 54 =
  9. 9.85 + 59 =
  10. 10.52 + 67 =
  11. 11.28 + 23 =
  12. 12.80 + 51 =
  13. 13.26 + 68 =
  14. 14.28 + 37 =
  15. 15.21 + 27 =
  16. 16.61 + 16 =
  17. 17.35 + 78 =
  18. 18.80 + 41 =
  19. 19.25 + 19 =
  20. 20.36 + 19 =
  21. 21.77 + 29 =
  22. 22.26 + 39 =
  23. 23.83 + 62 =
  24. 24.79 + 15 =
  25. 25.41 + 84 =
  26. 26.60 + 22 =
  27. 27.23 + 64 =
  28. 28.50 + 12 =
  29. 29.72 + 83 =
  30. 30.59 + 17 =
  31. 31.64 + 68 =
  32. 32.55 + 74 =
  33. 33.68 + 14 =
  34. 34.52 + 89 =
  35. 35.87 + 14 =
  36. 36.74 + 71 =
  37. 37.25 + 29 =
  38. 38.88 + 69 =
  39. 39.89 + 45 =
  40. 40.89 + 39 =

Answer key

  1. 87
  2. 81
  3. 82
  4. 109
  5. 112
  6. 63
  7. 48
  8. 76
  9. 144
  10. 119
  11. 51
  12. 131
  13. 94
  14. 65
  15. 48
  16. 77
  17. 113
  18. 121
  19. 44
  20. 55
  21. 106
  22. 65
  23. 145
  24. 94
  25. 125
  26. 82
  27. 87
  28. 62
  29. 155
  30. 76
  31. 132
  32. 129
  33. 82
  34. 141
  35. 101
  36. 145
  37. 54
  38. 157
  39. 134
  40. 128

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