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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 283 · 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. 1.41 + 34 =
  2. 2.48 + 19 =
  3. 3.78 + 21 =
  4. 4.85 + 51 =
  5. 5.67 + 61 =
  6. 6.71 + 17 =
  7. 7.23 + 79 =
  8. 8.37 + 52 =
  9. 9.76 + 86 =
  10. 10.52 + 67 =
  11. 11.57 + 25 =
  12. 12.41 + 89 =
  13. 13.27 + 18 =
  14. 14.79 + 29 =
  15. 15.80 + 82 =
  16. 16.22 + 21 =
  17. 17.40 + 71 =
  18. 18.61 + 67 =
  19. 19.37 + 35 =
  20. 20.30 + 29 =
  21. 21.45 + 46 =
  22. 22.81 + 41 =
  23. 23.43 + 45 =
  24. 24.78 + 45 =
  25. 25.81 + 31 =
  26. 26.60 + 69 =
  27. 27.33 + 41 =
  28. 28.58 + 23 =
  29. 29.35 + 35 =
  30. 30.69 + 77 =
  31. 31.48 + 29 =
  32. 32.68 + 19 =
  33. 33.30 + 13 =
  34. 34.47 + 62 =
  35. 35.65 + 89 =
  36. 36.62 + 87 =
  37. 37.65 + 71 =
  38. 38.89 + 43 =
  39. 39.23 + 12 =
  40. 40.27 + 64 =

Answer key

  1. 75
  2. 67
  3. 99
  4. 136
  5. 128
  6. 88
  7. 102
  8. 89
  9. 162
  10. 119
  11. 82
  12. 130
  13. 45
  14. 108
  15. 162
  16. 43
  17. 111
  18. 128
  19. 72
  20. 59
  21. 91
  22. 122
  23. 88
  24. 123
  25. 112
  26. 129
  27. 74
  28. 81
  29. 70
  30. 146
  31. 77
  32. 87
  33. 43
  34. 109
  35. 154
  36. 149
  37. 136
  38. 132
  39. 35
  40. 91

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