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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 32 · 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. 1.82 + 61 =
  2. 2.25 + 24 =
  3. 3.55 + 84 =
  4. 4.87 + 44 =
  5. 5.88 + 41 =
  6. 6.52 + 72 =
  7. 7.36 + 57 =
  8. 8.66 + 58 =
  9. 9.23 + 76 =
  10. 10.35 + 81 =
  11. 11.68 + 56 =
  12. 12.43 + 89 =
  13. 13.54 + 34 =
  14. 14.62 + 21 =
  15. 15.62 + 86 =
  16. 16.26 + 31 =
  17. 17.76 + 44 =
  18. 18.45 + 81 =
  19. 19.77 + 16 =
  20. 20.52 + 81 =
  21. 21.59 + 69 =
  22. 22.41 + 37 =
  23. 23.64 + 71 =
  24. 24.79 + 78 =
  25. 25.74 + 19 =
  26. 26.84 + 21 =
  27. 27.22 + 27 =
  28. 28.39 + 41 =
  29. 29.35 + 51 =
  30. 30.80 + 85 =
  31. 31.75 + 26 =
  32. 32.31 + 17 =
  33. 33.35 + 29 =
  34. 34.84 + 76 =
  35. 35.86 + 22 =
  36. 36.71 + 48 =
  37. 37.30 + 44 =
  38. 38.83 + 35 =
  39. 39.64 + 63 =
  40. 40.87 + 22 =

Answer key

  1. 143
  2. 49
  3. 139
  4. 131
  5. 129
  6. 124
  7. 93
  8. 124
  9. 99
  10. 116
  11. 124
  12. 132
  13. 88
  14. 83
  15. 148
  16. 57
  17. 120
  18. 126
  19. 93
  20. 133
  21. 128
  22. 78
  23. 135
  24. 157
  25. 93
  26. 105
  27. 49
  28. 80
  29. 86
  30. 165
  31. 101
  32. 48
  33. 64
  34. 160
  35. 108
  36. 119
  37. 74
  38. 118
  39. 127
  40. 109

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