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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 618 · 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. 1.56 + 62 =
  2. 2.34 + 43 =
  3. 3.26 + 32 =
  4. 4.78 + 18 =
  5. 5.48 + 24 =
  6. 6.60 + 12 =
  7. 7.31 + 21 =
  8. 8.77 + 49 =
  9. 9.65 + 24 =
  10. 10.78 + 25 =
  11. 11.23 + 21 =
  12. 12.22 + 16 =
  13. 13.78 + 51 =
  14. 14.89 + 66 =
  15. 15.78 + 77 =
  16. 16.46 + 74 =
  17. 17.54 + 46 =
  18. 18.85 + 13 =
  19. 19.74 + 37 =
  20. 20.67 + 86 =
  21. 21.55 + 35 =
  22. 22.51 + 83 =
  23. 23.86 + 32 =
  24. 24.22 + 38 =
  25. 25.21 + 13 =
  26. 26.43 + 21 =
  27. 27.42 + 72 =
  28. 28.42 + 61 =
  29. 29.58 + 23 =
  30. 30.40 + 75 =
  31. 31.66 + 32 =
  32. 32.70 + 17 =
  33. 33.63 + 21 =
  34. 34.78 + 59 =
  35. 35.41 + 84 =
  36. 36.50 + 83 =
  37. 37.46 + 48 =
  38. 38.35 + 44 =
  39. 39.78 + 89 =
  40. 40.46 + 87 =

Answer key

  1. 118
  2. 77
  3. 58
  4. 96
  5. 72
  6. 72
  7. 52
  8. 126
  9. 89
  10. 103
  11. 44
  12. 38
  13. 129
  14. 155
  15. 155
  16. 120
  17. 100
  18. 98
  19. 111
  20. 153
  21. 90
  22. 134
  23. 118
  24. 60
  25. 34
  26. 64
  27. 114
  28. 103
  29. 81
  30. 115
  31. 98
  32. 87
  33. 84
  34. 137
  35. 125
  36. 133
  37. 94
  38. 79
  39. 167
  40. 133

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