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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 116 · 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. 1.28 + 21 =
  2. 2.85 + 82 =
  3. 3.81 + 63 =
  4. 4.77 + 57 =
  5. 5.31 + 23 =
  6. 6.56 + 77 =
  7. 7.45 + 83 =
  8. 8.53 + 16 =
  9. 9.89 + 46 =
  10. 10.25 + 71 =
  11. 11.48 + 14 =
  12. 12.80 + 65 =
  13. 13.69 + 32 =
  14. 14.38 + 27 =
  15. 15.61 + 13 =
  16. 16.68 + 54 =
  17. 17.78 + 34 =
  18. 18.33 + 51 =
  19. 19.47 + 45 =
  20. 20.24 + 24 =
  21. 21.85 + 39 =
  22. 22.49 + 74 =
  23. 23.23 + 73 =
  24. 24.40 + 71 =
  25. 25.28 + 81 =
  26. 26.31 + 36 =
  27. 27.56 + 43 =
  28. 28.48 + 41 =
  29. 29.66 + 33 =
  30. 30.39 + 61 =
  31. 31.80 + 27 =
  32. 32.86 + 45 =
  33. 33.21 + 39 =
  34. 34.29 + 59 =
  35. 35.44 + 88 =
  36. 36.40 + 23 =
  37. 37.84 + 71 =
  38. 38.79 + 63 =
  39. 39.82 + 78 =
  40. 40.88 + 65 =

Answer key

  1. 49
  2. 167
  3. 144
  4. 134
  5. 54
  6. 133
  7. 128
  8. 69
  9. 135
  10. 96
  11. 62
  12. 145
  13. 101
  14. 65
  15. 74
  16. 122
  17. 112
  18. 84
  19. 92
  20. 48
  21. 124
  22. 123
  23. 96
  24. 111
  25. 109
  26. 67
  27. 99
  28. 89
  29. 99
  30. 100
  31. 107
  32. 131
  33. 60
  34. 88
  35. 132
  36. 63
  37. 155
  38. 142
  39. 160
  40. 153

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