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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 632 · 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. 1.73 + 23 =
  2. 2.59 + 81 =
  3. 3.81 + 88 =
  4. 4.58 + 77 =
  5. 5.82 + 89 =
  6. 6.70 + 77 =
  7. 7.59 + 32 =
  8. 8.67 + 41 =
  9. 9.59 + 17 =
  10. 10.37 + 31 =
  11. 11.59 + 66 =
  12. 12.48 + 33 =
  13. 13.22 + 54 =
  14. 14.68 + 64 =
  15. 15.58 + 59 =
  16. 16.42 + 52 =
  17. 17.81 + 21 =
  18. 18.73 + 59 =
  19. 19.82 + 61 =
  20. 20.28 + 37 =
  21. 21.84 + 42 =
  22. 22.69 + 72 =
  23. 23.24 + 41 =
  24. 24.83 + 67 =
  25. 25.26 + 62 =
  26. 26.84 + 45 =
  27. 27.23 + 17 =
  28. 28.64 + 48 =
  29. 29.89 + 79 =
  30. 30.88 + 75 =
  31. 31.27 + 31 =
  32. 32.37 + 74 =
  33. 33.64 + 54 =
  34. 34.24 + 79 =
  35. 35.72 + 37 =
  36. 36.34 + 29 =
  37. 37.47 + 21 =
  38. 38.21 + 71 =
  39. 39.21 + 32 =
  40. 40.51 + 43 =

Answer key

  1. 96
  2. 140
  3. 169
  4. 135
  5. 171
  6. 147
  7. 91
  8. 108
  9. 76
  10. 68
  11. 125
  12. 81
  13. 76
  14. 132
  15. 117
  16. 94
  17. 102
  18. 132
  19. 143
  20. 65
  21. 126
  22. 141
  23. 65
  24. 150
  25. 88
  26. 129
  27. 40
  28. 112
  29. 168
  30. 163
  31. 58
  32. 111
  33. 118
  34. 103
  35. 109
  36. 63
  37. 68
  38. 92
  39. 53
  40. 94

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