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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 517 · 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. 1.33 + 62 =
  2. 2.69 + 62 =
  3. 3.25 + 13 =
  4. 4.39 + 88 =
  5. 5.72 + 21 =
  6. 6.49 + 33 =
  7. 7.28 + 44 =
  8. 8.68 + 49 =
  9. 9.37 + 55 =
  10. 10.44 + 26 =
  11. 11.28 + 16 =
  12. 12.33 + 33 =
  13. 13.83 + 16 =
  14. 14.22 + 81 =
  15. 15.44 + 51 =
  16. 16.31 + 31 =
  17. 17.55 + 31 =
  18. 18.27 + 67 =
  19. 19.89 + 67 =
  20. 20.77 + 71 =
  21. 21.60 + 58 =
  22. 22.26 + 84 =
  23. 23.59 + 56 =
  24. 24.51 + 53 =
  25. 25.65 + 23 =
  26. 26.23 + 43 =
  27. 27.69 + 71 =
  28. 28.40 + 58 =
  29. 29.85 + 85 =
  30. 30.81 + 38 =
  31. 31.74 + 85 =
  32. 32.55 + 65 =
  33. 33.66 + 62 =
  34. 34.35 + 13 =
  35. 35.31 + 64 =
  36. 36.55 + 15 =
  37. 37.33 + 31 =
  38. 38.50 + 28 =
  39. 39.49 + 71 =
  40. 40.32 + 61 =

Answer key

  1. 95
  2. 131
  3. 38
  4. 127
  5. 93
  6. 82
  7. 72
  8. 117
  9. 92
  10. 70
  11. 44
  12. 66
  13. 99
  14. 103
  15. 95
  16. 62
  17. 86
  18. 94
  19. 156
  20. 148
  21. 118
  22. 110
  23. 115
  24. 104
  25. 88
  26. 66
  27. 140
  28. 98
  29. 170
  30. 119
  31. 159
  32. 120
  33. 128
  34. 48
  35. 95
  36. 70
  37. 64
  38. 78
  39. 120
  40. 93

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