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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 196 · 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. 1.86 + 43 =
  2. 2.71 + 74 =
  3. 3.58 + 76 =
  4. 4.42 + 65 =
  5. 5.79 + 61 =
  6. 6.72 + 48 =
  7. 7.75 + 84 =
  8. 8.39 + 89 =
  9. 9.58 + 33 =
  10. 10.56 + 53 =
  11. 11.43 + 34 =
  12. 12.88 + 19 =
  13. 13.85 + 73 =
  14. 14.42 + 81 =
  15. 15.69 + 14 =
  16. 16.30 + 81 =
  17. 17.77 + 64 =
  18. 18.75 + 47 =
  19. 19.30 + 58 =
  20. 20.50 + 75 =
  21. 21.83 + 84 =
  22. 22.65 + 66 =
  23. 23.70 + 21 =
  24. 24.40 + 12 =
  25. 25.77 + 88 =
  26. 26.24 + 65 =
  27. 27.47 + 56 =
  28. 28.87 + 86 =
  29. 29.74 + 87 =
  30. 30.88 + 63 =
  31. 31.59 + 75 =
  32. 32.74 + 57 =
  33. 33.62 + 86 =
  34. 34.39 + 24 =
  35. 35.26 + 89 =
  36. 36.52 + 52 =
  37. 37.72 + 35 =
  38. 38.28 + 55 =
  39. 39.22 + 72 =
  40. 40.28 + 58 =

Answer key

  1. 129
  2. 145
  3. 134
  4. 107
  5. 140
  6. 120
  7. 159
  8. 128
  9. 91
  10. 109
  11. 77
  12. 107
  13. 158
  14. 123
  15. 83
  16. 111
  17. 141
  18. 122
  19. 88
  20. 125
  21. 167
  22. 131
  23. 91
  24. 52
  25. 165
  26. 89
  27. 103
  28. 173
  29. 161
  30. 151
  31. 134
  32. 131
  33. 148
  34. 63
  35. 115
  36. 104
  37. 107
  38. 83
  39. 94
  40. 86

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