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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 440 · 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. 1.65 + 37 =
  2. 2.36 + 58 =
  3. 3.66 + 67 =
  4. 4.64 + 65 =
  5. 5.67 + 24 =
  6. 6.77 + 74 =
  7. 7.72 + 37 =
  8. 8.31 + 71 =
  9. 9.57 + 51 =
  10. 10.29 + 76 =
  11. 11.37 + 43 =
  12. 12.86 + 24 =
  13. 13.71 + 44 =
  14. 14.37 + 26 =
  15. 15.21 + 76 =
  16. 16.54 + 62 =
  17. 17.32 + 81 =
  18. 18.64 + 36 =
  19. 19.29 + 81 =
  20. 20.65 + 76 =
  21. 21.26 + 87 =
  22. 22.79 + 61 =
  23. 23.36 + 31 =
  24. 24.39 + 79 =
  25. 25.59 + 58 =
  26. 26.62 + 24 =
  27. 27.48 + 61 =
  28. 28.26 + 75 =
  29. 29.71 + 62 =
  30. 30.28 + 31 =
  31. 31.60 + 74 =
  32. 32.23 + 26 =
  33. 33.41 + 31 =
  34. 34.79 + 34 =
  35. 35.26 + 47 =
  36. 36.77 + 88 =
  37. 37.72 + 15 =
  38. 38.41 + 43 =
  39. 39.73 + 18 =
  40. 40.57 + 41 =

Answer key

  1. 102
  2. 94
  3. 133
  4. 129
  5. 91
  6. 151
  7. 109
  8. 102
  9. 108
  10. 105
  11. 80
  12. 110
  13. 115
  14. 63
  15. 97
  16. 116
  17. 113
  18. 100
  19. 110
  20. 141
  21. 113
  22. 140
  23. 67
  24. 118
  25. 117
  26. 86
  27. 109
  28. 101
  29. 133
  30. 59
  31. 134
  32. 49
  33. 72
  34. 113
  35. 73
  36. 165
  37. 87
  38. 84
  39. 91
  40. 98

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