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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 253 · 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. 1.51 + 32 =
  2. 2.36 + 43 =
  3. 3.56 + 37 =
  4. 4.79 + 67 =
  5. 5.78 + 83 =
  6. 6.75 + 38 =
  7. 7.22 + 76 =
  8. 8.52 + 16 =
  9. 9.60 + 42 =
  10. 10.49 + 17 =
  11. 11.72 + 65 =
  12. 12.34 + 39 =
  13. 13.35 + 68 =
  14. 14.56 + 62 =
  15. 15.63 + 15 =
  16. 16.62 + 46 =
  17. 17.22 + 74 =
  18. 18.70 + 64 =
  19. 19.22 + 81 =
  20. 20.56 + 18 =
  21. 21.70 + 47 =
  22. 22.73 + 35 =
  23. 23.35 + 55 =
  24. 24.26 + 46 =
  25. 25.86 + 81 =
  26. 26.56 + 57 =
  27. 27.54 + 71 =
  28. 28.56 + 59 =
  29. 29.59 + 16 =
  30. 30.64 + 54 =
  31. 31.59 + 71 =
  32. 32.30 + 16 =
  33. 33.54 + 22 =
  34. 34.34 + 43 =
  35. 35.29 + 69 =
  36. 36.82 + 69 =
  37. 37.22 + 21 =
  38. 38.22 + 29 =
  39. 39.38 + 31 =
  40. 40.58 + 58 =

Answer key

  1. 83
  2. 79
  3. 93
  4. 146
  5. 161
  6. 113
  7. 98
  8. 68
  9. 102
  10. 66
  11. 137
  12. 73
  13. 103
  14. 118
  15. 78
  16. 108
  17. 96
  18. 134
  19. 103
  20. 74
  21. 117
  22. 108
  23. 90
  24. 72
  25. 167
  26. 113
  27. 125
  28. 115
  29. 75
  30. 118
  31. 130
  32. 46
  33. 76
  34. 77
  35. 98
  36. 151
  37. 43
  38. 51
  39. 69
  40. 116

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