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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 690 · 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. 1.34 + 38 =
  2. 2.31 + 53 =
  3. 3.27 + 56 =
  4. 4.83 + 17 =
  5. 5.59 + 23 =
  6. 6.23 + 31 =
  7. 7.77 + 81 =
  8. 8.64 + 85 =
  9. 9.39 + 83 =
  10. 10.43 + 45 =
  11. 11.77 + 82 =
  12. 12.49 + 22 =
  13. 13.72 + 12 =
  14. 14.21 + 29 =
  15. 15.84 + 21 =
  16. 16.61 + 34 =
  17. 17.72 + 49 =
  18. 18.30 + 63 =
  19. 19.57 + 21 =
  20. 20.71 + 41 =
  21. 21.70 + 57 =
  22. 22.82 + 87 =
  23. 23.23 + 28 =
  24. 24.34 + 62 =
  25. 25.49 + 51 =
  26. 26.43 + 39 =
  27. 27.35 + 27 =
  28. 28.26 + 21 =
  29. 29.21 + 16 =
  30. 30.81 + 25 =
  31. 31.37 + 26 =
  32. 32.51 + 17 =
  33. 33.89 + 23 =
  34. 34.84 + 16 =
  35. 35.42 + 24 =
  36. 36.46 + 78 =
  37. 37.57 + 25 =
  38. 38.69 + 57 =
  39. 39.23 + 81 =
  40. 40.64 + 71 =

Answer key

  1. 72
  2. 84
  3. 83
  4. 100
  5. 82
  6. 54
  7. 158
  8. 149
  9. 122
  10. 88
  11. 159
  12. 71
  13. 84
  14. 50
  15. 105
  16. 95
  17. 121
  18. 93
  19. 78
  20. 112
  21. 127
  22. 169
  23. 51
  24. 96
  25. 100
  26. 82
  27. 62
  28. 47
  29. 37
  30. 106
  31. 63
  32. 68
  33. 112
  34. 100
  35. 66
  36. 124
  37. 82
  38. 126
  39. 104
  40. 135

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