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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 180 · 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. 1.36 + 83 =
  2. 2.81 + 18 =
  3. 3.79 + 12 =
  4. 4.28 + 71 =
  5. 5.35 + 24 =
  6. 6.35 + 87 =
  7. 7.64 + 77 =
  8. 8.44 + 52 =
  9. 9.88 + 55 =
  10. 10.60 + 31 =
  11. 11.67 + 26 =
  12. 12.32 + 89 =
  13. 13.36 + 62 =
  14. 14.30 + 73 =
  15. 15.57 + 27 =
  16. 16.36 + 12 =
  17. 17.60 + 14 =
  18. 18.88 + 58 =
  19. 19.87 + 83 =
  20. 20.56 + 73 =
  21. 21.62 + 16 =
  22. 22.66 + 23 =
  23. 23.64 + 74 =
  24. 24.21 + 84 =
  25. 25.71 + 45 =
  26. 26.74 + 66 =
  27. 27.38 + 34 =
  28. 28.72 + 17 =
  29. 29.58 + 71 =
  30. 30.88 + 61 =
  31. 31.65 + 29 =
  32. 32.79 + 62 =
  33. 33.58 + 14 =
  34. 34.47 + 25 =
  35. 35.70 + 14 =
  36. 36.35 + 77 =
  37. 37.79 + 32 =
  38. 38.57 + 66 =
  39. 39.68 + 89 =
  40. 40.52 + 46 =

Answer key

  1. 119
  2. 99
  3. 91
  4. 99
  5. 59
  6. 122
  7. 141
  8. 96
  9. 143
  10. 91
  11. 93
  12. 121
  13. 98
  14. 103
  15. 84
  16. 48
  17. 74
  18. 146
  19. 170
  20. 129
  21. 78
  22. 89
  23. 138
  24. 105
  25. 116
  26. 140
  27. 72
  28. 89
  29. 129
  30. 149
  31. 94
  32. 141
  33. 72
  34. 72
  35. 84
  36. 112
  37. 111
  38. 123
  39. 157
  40. 98

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