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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 384 · 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. 1.42 + 55 =
  2. 2.58 + 78 =
  3. 3.77 + 39 =
  4. 4.30 + 83 =
  5. 5.85 + 31 =
  6. 6.41 + 61 =
  7. 7.51 + 19 =
  8. 8.73 + 17 =
  9. 9.84 + 41 =
  10. 10.37 + 21 =
  11. 11.28 + 77 =
  12. 12.87 + 41 =
  13. 13.47 + 54 =
  14. 14.69 + 79 =
  15. 15.38 + 75 =
  16. 16.25 + 21 =
  17. 17.80 + 74 =
  18. 18.69 + 61 =
  19. 19.42 + 67 =
  20. 20.54 + 61 =
  21. 21.70 + 84 =
  22. 22.56 + 21 =
  23. 23.21 + 15 =
  24. 24.79 + 34 =
  25. 25.70 + 51 =
  26. 26.25 + 22 =
  27. 27.71 + 41 =
  28. 28.45 + 41 =
  29. 29.21 + 52 =
  30. 30.79 + 27 =
  31. 31.35 + 21 =
  32. 32.77 + 13 =
  33. 33.89 + 77 =
  34. 34.53 + 78 =
  35. 35.49 + 68 =
  36. 36.26 + 56 =
  37. 37.47 + 46 =
  38. 38.68 + 51 =
  39. 39.39 + 46 =
  40. 40.86 + 62 =

Answer key

  1. 97
  2. 136
  3. 116
  4. 113
  5. 116
  6. 102
  7. 70
  8. 90
  9. 125
  10. 58
  11. 105
  12. 128
  13. 101
  14. 148
  15. 113
  16. 46
  17. 154
  18. 130
  19. 109
  20. 115
  21. 154
  22. 77
  23. 36
  24. 113
  25. 121
  26. 47
  27. 112
  28. 86
  29. 73
  30. 106
  31. 56
  32. 90
  33. 166
  34. 131
  35. 117
  36. 82
  37. 93
  38. 119
  39. 85
  40. 148

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