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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 804 · 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. 1.64 + 12 =
  2. 2.30 + 22 =
  3. 3.75 + 12 =
  4. 4.53 + 13 =
  5. 5.34 + 29 =
  6. 6.86 + 16 =
  7. 7.89 + 71 =
  8. 8.40 + 26 =
  9. 9.51 + 35 =
  10. 10.74 + 17 =
  11. 11.76 + 35 =
  12. 12.21 + 44 =
  13. 13.55 + 24 =
  14. 14.59 + 45 =
  15. 15.39 + 24 =
  16. 16.21 + 76 =
  17. 17.44 + 72 =
  18. 18.60 + 36 =
  19. 19.31 + 16 =
  20. 20.63 + 19 =
  21. 21.77 + 44 =
  22. 22.54 + 51 =
  23. 23.87 + 68 =
  24. 24.27 + 13 =
  25. 25.49 + 13 =
  26. 26.62 + 59 =
  27. 27.88 + 15 =
  28. 28.72 + 62 =
  29. 29.79 + 41 =
  30. 30.64 + 24 =
  31. 31.30 + 84 =
  32. 32.48 + 35 =
  33. 33.48 + 55 =
  34. 34.71 + 85 =
  35. 35.83 + 82 =
  36. 36.28 + 21 =
  37. 37.55 + 82 =
  38. 38.80 + 27 =
  39. 39.40 + 59 =
  40. 40.28 + 81 =

Answer key

  1. 76
  2. 52
  3. 87
  4. 66
  5. 63
  6. 102
  7. 160
  8. 66
  9. 86
  10. 91
  11. 111
  12. 65
  13. 79
  14. 104
  15. 63
  16. 97
  17. 116
  18. 96
  19. 47
  20. 82
  21. 121
  22. 105
  23. 155
  24. 40
  25. 62
  26. 121
  27. 103
  28. 134
  29. 120
  30. 88
  31. 114
  32. 83
  33. 103
  34. 156
  35. 165
  36. 49
  37. 137
  38. 107
  39. 99
  40. 109

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