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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 657 · 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. 1.38 + 36 =
  2. 2.54 + 75 =
  3. 3.76 + 44 =
  4. 4.37 + 76 =
  5. 5.66 + 63 =
  6. 6.35 + 73 =
  7. 7.52 + 44 =
  8. 8.23 + 73 =
  9. 9.66 + 67 =
  10. 10.32 + 13 =
  11. 11.70 + 26 =
  12. 12.48 + 22 =
  13. 13.53 + 85 =
  14. 14.22 + 12 =
  15. 15.31 + 64 =
  16. 16.55 + 16 =
  17. 17.44 + 21 =
  18. 18.65 + 23 =
  19. 19.65 + 15 =
  20. 20.43 + 37 =
  21. 21.33 + 77 =
  22. 22.54 + 71 =
  23. 23.76 + 12 =
  24. 24.63 + 74 =
  25. 25.45 + 37 =
  26. 26.43 + 74 =
  27. 27.29 + 24 =
  28. 28.23 + 76 =
  29. 29.46 + 45 =
  30. 30.51 + 31 =
  31. 31.26 + 75 =
  32. 32.33 + 71 =
  33. 33.33 + 18 =
  34. 34.78 + 85 =
  35. 35.89 + 85 =
  36. 36.31 + 86 =
  37. 37.47 + 22 =
  38. 38.57 + 31 =
  39. 39.85 + 68 =
  40. 40.23 + 61 =

Answer key

  1. 74
  2. 129
  3. 120
  4. 113
  5. 129
  6. 108
  7. 96
  8. 96
  9. 133
  10. 45
  11. 96
  12. 70
  13. 138
  14. 34
  15. 95
  16. 71
  17. 65
  18. 88
  19. 80
  20. 80
  21. 110
  22. 125
  23. 88
  24. 137
  25. 82
  26. 117
  27. 53
  28. 99
  29. 91
  30. 82
  31. 101
  32. 104
  33. 51
  34. 163
  35. 174
  36. 117
  37. 69
  38. 88
  39. 153
  40. 84

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