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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 169 · 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. 1.24 + 46 =
  2. 2.29 + 45 =
  3. 3.44 + 61 =
  4. 4.46 + 46 =
  5. 5.32 + 81 =
  6. 6.75 + 27 =
  7. 7.22 + 21 =
  8. 8.37 + 19 =
  9. 9.55 + 21 =
  10. 10.78 + 77 =
  11. 11.31 + 57 =
  12. 12.77 + 46 =
  13. 13.43 + 48 =
  14. 14.68 + 75 =
  15. 15.82 + 27 =
  16. 16.29 + 49 =
  17. 17.35 + 66 =
  18. 18.38 + 72 =
  19. 19.35 + 68 =
  20. 20.37 + 28 =
  21. 21.86 + 41 =
  22. 22.39 + 64 =
  23. 23.78 + 58 =
  24. 24.76 + 78 =
  25. 25.76 + 67 =
  26. 26.61 + 15 =
  27. 27.76 + 61 =
  28. 28.36 + 78 =
  29. 29.44 + 28 =
  30. 30.60 + 81 =
  31. 31.83 + 65 =
  32. 32.76 + 62 =
  33. 33.70 + 58 =
  34. 34.21 + 34 =
  35. 35.56 + 81 =
  36. 36.22 + 41 =
  37. 37.46 + 14 =
  38. 38.33 + 33 =
  39. 39.24 + 79 =
  40. 40.69 + 13 =

Answer key

  1. 70
  2. 74
  3. 105
  4. 92
  5. 113
  6. 102
  7. 43
  8. 56
  9. 76
  10. 155
  11. 88
  12. 123
  13. 91
  14. 143
  15. 109
  16. 78
  17. 101
  18. 110
  19. 103
  20. 65
  21. 127
  22. 103
  23. 136
  24. 154
  25. 143
  26. 76
  27. 137
  28. 114
  29. 72
  30. 141
  31. 148
  32. 138
  33. 128
  34. 55
  35. 137
  36. 63
  37. 60
  38. 66
  39. 103
  40. 82

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