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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 691 · 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 + 37 =
  2. 2.35 + 15 =
  3. 3.43 + 83 =
  4. 4.36 + 76 =
  5. 5.23 + 84 =
  6. 6.64 + 71 =
  7. 7.60 + 27 =
  8. 8.86 + 58 =
  9. 9.60 + 44 =
  10. 10.21 + 13 =
  11. 11.88 + 15 =
  12. 12.80 + 72 =
  13. 13.22 + 89 =
  14. 14.85 + 82 =
  15. 15.33 + 21 =
  16. 16.23 + 32 =
  17. 17.29 + 65 =
  18. 18.78 + 76 =
  19. 19.63 + 21 =
  20. 20.73 + 43 =
  21. 21.55 + 18 =
  22. 22.71 + 14 =
  23. 23.30 + 81 =
  24. 24.56 + 64 =
  25. 25.84 + 13 =
  26. 26.87 + 16 =
  27. 27.83 + 56 =
  28. 28.69 + 21 =
  29. 29.48 + 74 =
  30. 30.58 + 58 =
  31. 31.88 + 62 =
  32. 32.78 + 31 =
  33. 33.87 + 89 =
  34. 34.67 + 69 =
  35. 35.79 + 29 =
  36. 36.43 + 51 =
  37. 37.84 + 57 =
  38. 38.22 + 28 =
  39. 39.29 + 51 =
  40. 40.49 + 41 =

Answer key

  1. 70
  2. 50
  3. 126
  4. 112
  5. 107
  6. 135
  7. 87
  8. 144
  9. 104
  10. 34
  11. 103
  12. 152
  13. 111
  14. 167
  15. 54
  16. 55
  17. 94
  18. 154
  19. 84
  20. 116
  21. 73
  22. 85
  23. 111
  24. 120
  25. 97
  26. 103
  27. 139
  28. 90
  29. 122
  30. 116
  31. 150
  32. 109
  33. 176
  34. 136
  35. 108
  36. 94
  37. 141
  38. 50
  39. 80
  40. 90

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