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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 432 · 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. 1.72 + 82 =
  2. 2.35 + 41 =
  3. 3.61 + 67 =
  4. 4.48 + 65 =
  5. 5.49 + 27 =
  6. 6.40 + 86 =
  7. 7.49 + 68 =
  8. 8.32 + 27 =
  9. 9.57 + 64 =
  10. 10.52 + 85 =
  11. 11.60 + 66 =
  12. 12.53 + 54 =
  13. 13.40 + 21 =
  14. 14.54 + 28 =
  15. 15.25 + 21 =
  16. 16.44 + 44 =
  17. 17.34 + 63 =
  18. 18.32 + 66 =
  19. 19.38 + 36 =
  20. 20.64 + 74 =
  21. 21.75 + 29 =
  22. 22.76 + 41 =
  23. 23.89 + 79 =
  24. 24.37 + 15 =
  25. 25.75 + 82 =
  26. 26.25 + 55 =
  27. 27.74 + 59 =
  28. 28.38 + 18 =
  29. 29.37 + 38 =
  30. 30.72 + 24 =
  31. 31.45 + 44 =
  32. 32.72 + 53 =
  33. 33.27 + 86 =
  34. 34.69 + 77 =
  35. 35.44 + 57 =
  36. 36.28 + 25 =
  37. 37.87 + 41 =
  38. 38.66 + 14 =
  39. 39.46 + 66 =
  40. 40.64 + 23 =

Answer key

  1. 154
  2. 76
  3. 128
  4. 113
  5. 76
  6. 126
  7. 117
  8. 59
  9. 121
  10. 137
  11. 126
  12. 107
  13. 61
  14. 82
  15. 46
  16. 88
  17. 97
  18. 98
  19. 74
  20. 138
  21. 104
  22. 117
  23. 168
  24. 52
  25. 157
  26. 80
  27. 133
  28. 56
  29. 75
  30. 96
  31. 89
  32. 125
  33. 113
  34. 146
  35. 101
  36. 53
  37. 128
  38. 80
  39. 112
  40. 87

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