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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 365 · 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. 1.67 + 61 =
  2. 2.48 + 21 =
  3. 3.58 + 79 =
  4. 4.23 + 35 =
  5. 5.68 + 21 =
  6. 6.64 + 48 =
  7. 7.55 + 84 =
  8. 8.30 + 14 =
  9. 9.35 + 12 =
  10. 10.40 + 16 =
  11. 11.21 + 26 =
  12. 12.34 + 68 =
  13. 13.35 + 13 =
  14. 14.62 + 71 =
  15. 15.62 + 69 =
  16. 16.60 + 43 =
  17. 17.48 + 32 =
  18. 18.48 + 25 =
  19. 19.44 + 16 =
  20. 20.32 + 12 =
  21. 21.26 + 49 =
  22. 22.37 + 55 =
  23. 23.80 + 76 =
  24. 24.28 + 22 =
  25. 25.78 + 71 =
  26. 26.86 + 21 =
  27. 27.45 + 85 =
  28. 28.65 + 52 =
  29. 29.32 + 44 =
  30. 30.52 + 43 =
  31. 31.38 + 45 =
  32. 32.71 + 56 =
  33. 33.81 + 67 =
  34. 34.66 + 68 =
  35. 35.48 + 87 =
  36. 36.43 + 65 =
  37. 37.25 + 23 =
  38. 38.57 + 39 =
  39. 39.60 + 53 =
  40. 40.43 + 21 =

Answer key

  1. 128
  2. 69
  3. 137
  4. 58
  5. 89
  6. 112
  7. 139
  8. 44
  9. 47
  10. 56
  11. 47
  12. 102
  13. 48
  14. 133
  15. 131
  16. 103
  17. 80
  18. 73
  19. 60
  20. 44
  21. 75
  22. 92
  23. 156
  24. 50
  25. 149
  26. 107
  27. 130
  28. 117
  29. 76
  30. 95
  31. 83
  32. 127
  33. 148
  34. 134
  35. 135
  36. 108
  37. 48
  38. 96
  39. 113
  40. 64

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