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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 219 · 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. 1.22 + 51 =
  2. 2.78 + 31 =
  3. 3.61 + 76 =
  4. 4.69 + 47 =
  5. 5.26 + 57 =
  6. 6.33 + 76 =
  7. 7.46 + 15 =
  8. 8.53 + 17 =
  9. 9.51 + 77 =
  10. 10.69 + 77 =
  11. 11.31 + 31 =
  12. 12.85 + 37 =
  13. 13.68 + 41 =
  14. 14.61 + 68 =
  15. 15.77 + 86 =
  16. 16.26 + 69 =
  17. 17.81 + 88 =
  18. 18.83 + 61 =
  19. 19.73 + 31 =
  20. 20.74 + 27 =
  21. 21.34 + 24 =
  22. 22.44 + 21 =
  23. 23.62 + 33 =
  24. 24.84 + 34 =
  25. 25.64 + 71 =
  26. 26.68 + 77 =
  27. 27.51 + 24 =
  28. 28.48 + 67 =
  29. 29.45 + 82 =
  30. 30.33 + 14 =
  31. 31.41 + 19 =
  32. 32.28 + 76 =
  33. 33.83 + 49 =
  34. 34.65 + 89 =
  35. 35.27 + 73 =
  36. 36.37 + 13 =
  37. 37.64 + 29 =
  38. 38.30 + 43 =
  39. 39.44 + 87 =
  40. 40.82 + 26 =

Answer key

  1. 73
  2. 109
  3. 137
  4. 116
  5. 83
  6. 109
  7. 61
  8. 70
  9. 128
  10. 146
  11. 62
  12. 122
  13. 109
  14. 129
  15. 163
  16. 95
  17. 169
  18. 144
  19. 104
  20. 101
  21. 58
  22. 65
  23. 95
  24. 118
  25. 135
  26. 145
  27. 75
  28. 115
  29. 127
  30. 47
  31. 60
  32. 104
  33. 132
  34. 154
  35. 100
  36. 50
  37. 93
  38. 73
  39. 131
  40. 108

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