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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 803 · 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 + 85 =
  3. 3.58 + 14 =
  4. 4.87 + 62 =
  5. 5.57 + 27 =
  6. 6.49 + 64 =
  7. 7.44 + 76 =
  8. 8.30 + 68 =
  9. 9.38 + 74 =
  10. 10.78 + 27 =
  11. 11.22 + 53 =
  12. 12.72 + 49 =
  13. 13.60 + 45 =
  14. 14.87 + 68 =
  15. 15.45 + 48 =
  16. 16.89 + 21 =
  17. 17.45 + 81 =
  18. 18.49 + 56 =
  19. 19.61 + 73 =
  20. 20.66 + 17 =
  21. 21.27 + 71 =
  22. 22.24 + 31 =
  23. 23.67 + 39 =
  24. 24.78 + 44 =
  25. 25.58 + 72 =
  26. 26.86 + 46 =
  27. 27.56 + 41 =
  28. 28.59 + 69 =
  29. 29.73 + 29 =
  30. 30.21 + 16 =
  31. 31.82 + 21 =
  32. 32.60 + 68 =
  33. 33.37 + 71 =
  34. 34.29 + 16 =
  35. 35.34 + 88 =
  36. 36.63 + 31 =
  37. 37.30 + 41 =
  38. 38.42 + 21 =
  39. 39.79 + 62 =
  40. 40.22 + 19 =

Answer key

  1. 70
  2. 120
  3. 72
  4. 149
  5. 84
  6. 113
  7. 120
  8. 98
  9. 112
  10. 105
  11. 75
  12. 121
  13. 105
  14. 155
  15. 93
  16. 110
  17. 126
  18. 105
  19. 134
  20. 83
  21. 98
  22. 55
  23. 106
  24. 122
  25. 130
  26. 132
  27. 97
  28. 128
  29. 102
  30. 37
  31. 103
  32. 128
  33. 108
  34. 45
  35. 122
  36. 94
  37. 71
  38. 63
  39. 141
  40. 41

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