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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 208 · 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. 1.81 + 14 =
  2. 2.34 + 65 =
  3. 3.34 + 38 =
  4. 4.80 + 28 =
  5. 5.27 + 24 =
  6. 6.28 + 89 =
  7. 7.58 + 14 =
  8. 8.35 + 49 =
  9. 9.57 + 36 =
  10. 10.81 + 34 =
  11. 11.66 + 78 =
  12. 12.75 + 75 =
  13. 13.88 + 76 =
  14. 14.25 + 48 =
  15. 15.42 + 21 =
  16. 16.35 + 13 =
  17. 17.45 + 44 =
  18. 18.56 + 81 =
  19. 19.83 + 37 =
  20. 20.39 + 29 =
  21. 21.47 + 71 =
  22. 22.37 + 17 =
  23. 23.27 + 77 =
  24. 24.44 + 28 =
  25. 25.71 + 54 =
  26. 26.35 + 52 =
  27. 27.32 + 24 =
  28. 28.48 + 31 =
  29. 29.35 + 27 =
  30. 30.78 + 82 =
  31. 31.58 + 75 =
  32. 32.34 + 31 =
  33. 33.53 + 42 =
  34. 34.63 + 21 =
  35. 35.60 + 35 =
  36. 36.31 + 16 =
  37. 37.49 + 64 =
  38. 38.48 + 67 =
  39. 39.87 + 61 =
  40. 40.36 + 41 =

Answer key

  1. 95
  2. 99
  3. 72
  4. 108
  5. 51
  6. 117
  7. 72
  8. 84
  9. 93
  10. 115
  11. 144
  12. 150
  13. 164
  14. 73
  15. 63
  16. 48
  17. 89
  18. 137
  19. 120
  20. 68
  21. 118
  22. 54
  23. 104
  24. 72
  25. 125
  26. 87
  27. 56
  28. 79
  29. 62
  30. 160
  31. 133
  32. 65
  33. 95
  34. 84
  35. 95
  36. 47
  37. 113
  38. 115
  39. 148
  40. 77

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