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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 227 · 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. 1.40 + 62 =
  2. 2.30 + 73 =
  3. 3.34 + 57 =
  4. 4.64 + 38 =
  5. 5.80 + 72 =
  6. 6.51 + 36 =
  7. 7.47 + 83 =
  8. 8.72 + 65 =
  9. 9.71 + 31 =
  10. 10.80 + 76 =
  11. 11.57 + 72 =
  12. 12.72 + 19 =
  13. 13.57 + 63 =
  14. 14.42 + 51 =
  15. 15.71 + 12 =
  16. 16.26 + 25 =
  17. 17.57 + 31 =
  18. 18.32 + 69 =
  19. 19.22 + 86 =
  20. 20.58 + 89 =
  21. 21.71 + 87 =
  22. 22.57 + 66 =
  23. 23.60 + 56 =
  24. 24.64 + 55 =
  25. 25.88 + 12 =
  26. 26.21 + 87 =
  27. 27.69 + 28 =
  28. 28.56 + 82 =
  29. 29.27 + 65 =
  30. 30.62 + 31 =
  31. 31.30 + 46 =
  32. 32.86 + 22 =
  33. 33.79 + 31 =
  34. 34.64 + 85 =
  35. 35.89 + 74 =
  36. 36.31 + 31 =
  37. 37.28 + 51 =
  38. 38.64 + 63 =
  39. 39.43 + 16 =
  40. 40.35 + 29 =

Answer key

  1. 102
  2. 103
  3. 91
  4. 102
  5. 152
  6. 87
  7. 130
  8. 137
  9. 102
  10. 156
  11. 129
  12. 91
  13. 120
  14. 93
  15. 83
  16. 51
  17. 88
  18. 101
  19. 108
  20. 147
  21. 158
  22. 123
  23. 116
  24. 119
  25. 100
  26. 108
  27. 97
  28. 138
  29. 92
  30. 93
  31. 76
  32. 108
  33. 110
  34. 149
  35. 163
  36. 62
  37. 79
  38. 127
  39. 59
  40. 64

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