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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 602 · 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. 1.58 + 51 =
  2. 2.63 + 25 =
  3. 3.55 + 39 =
  4. 4.76 + 51 =
  5. 5.23 + 46 =
  6. 6.87 + 82 =
  7. 7.78 + 36 =
  8. 8.60 + 29 =
  9. 9.43 + 64 =
  10. 10.28 + 24 =
  11. 11.76 + 46 =
  12. 12.58 + 73 =
  13. 13.63 + 12 =
  14. 14.73 + 15 =
  15. 15.23 + 78 =
  16. 16.37 + 14 =
  17. 17.67 + 58 =
  18. 18.49 + 26 =
  19. 19.84 + 82 =
  20. 20.74 + 37 =
  21. 21.55 + 22 =
  22. 22.28 + 31 =
  23. 23.66 + 76 =
  24. 24.51 + 54 =
  25. 25.22 + 65 =
  26. 26.24 + 22 =
  27. 27.24 + 73 =
  28. 28.26 + 81 =
  29. 29.74 + 15 =
  30. 30.47 + 68 =
  31. 31.34 + 64 =
  32. 32.71 + 14 =
  33. 33.51 + 74 =
  34. 34.38 + 61 =
  35. 35.67 + 89 =
  36. 36.71 + 89 =
  37. 37.59 + 28 =
  38. 38.28 + 34 =
  39. 39.84 + 77 =
  40. 40.84 + 49 =

Answer key

  1. 109
  2. 88
  3. 94
  4. 127
  5. 69
  6. 169
  7. 114
  8. 89
  9. 107
  10. 52
  11. 122
  12. 131
  13. 75
  14. 88
  15. 101
  16. 51
  17. 125
  18. 75
  19. 166
  20. 111
  21. 77
  22. 59
  23. 142
  24. 105
  25. 87
  26. 46
  27. 97
  28. 107
  29. 89
  30. 115
  31. 98
  32. 85
  33. 125
  34. 99
  35. 156
  36. 160
  37. 87
  38. 62
  39. 161
  40. 133

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