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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 519 · 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. 1.33 + 62 =
  2. 2.43 + 23 =
  3. 3.26 + 66 =
  4. 4.39 + 26 =
  5. 5.23 + 41 =
  6. 6.72 + 22 =
  7. 7.44 + 52 =
  8. 8.85 + 76 =
  9. 9.42 + 15 =
  10. 10.34 + 18 =
  11. 11.79 + 83 =
  12. 12.53 + 21 =
  13. 13.48 + 54 =
  14. 14.58 + 63 =
  15. 15.25 + 32 =
  16. 16.54 + 53 =
  17. 17.86 + 69 =
  18. 18.48 + 75 =
  19. 19.26 + 31 =
  20. 20.22 + 67 =
  21. 21.50 + 82 =
  22. 22.52 + 63 =
  23. 23.70 + 21 =
  24. 24.26 + 83 =
  25. 25.63 + 39 =
  26. 26.68 + 34 =
  27. 27.79 + 46 =
  28. 28.52 + 85 =
  29. 29.29 + 45 =
  30. 30.82 + 55 =
  31. 31.71 + 17 =
  32. 32.67 + 61 =
  33. 33.34 + 22 =
  34. 34.85 + 69 =
  35. 35.55 + 56 =
  36. 36.29 + 75 =
  37. 37.25 + 31 =
  38. 38.75 + 82 =
  39. 39.72 + 34 =
  40. 40.42 + 75 =

Answer key

  1. 95
  2. 66
  3. 92
  4. 65
  5. 64
  6. 94
  7. 96
  8. 161
  9. 57
  10. 52
  11. 162
  12. 74
  13. 102
  14. 121
  15. 57
  16. 107
  17. 155
  18. 123
  19. 57
  20. 89
  21. 132
  22. 115
  23. 91
  24. 109
  25. 102
  26. 102
  27. 125
  28. 137
  29. 74
  30. 137
  31. 88
  32. 128
  33. 56
  34. 154
  35. 111
  36. 104
  37. 56
  38. 157
  39. 106
  40. 117

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