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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 174 · 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. 1.83 + 53 =
  2. 2.35 + 84 =
  3. 3.36 + 86 =
  4. 4.88 + 26 =
  5. 5.28 + 87 =
  6. 6.40 + 71 =
  7. 7.68 + 24 =
  8. 8.39 + 28 =
  9. 9.47 + 39 =
  10. 10.86 + 51 =
  11. 11.60 + 15 =
  12. 12.28 + 35 =
  13. 13.79 + 49 =
  14. 14.68 + 88 =
  15. 15.21 + 69 =
  16. 16.38 + 55 =
  17. 17.59 + 21 =
  18. 18.27 + 26 =
  19. 19.83 + 21 =
  20. 20.75 + 82 =
  21. 21.62 + 79 =
  22. 22.82 + 61 =
  23. 23.77 + 46 =
  24. 24.81 + 37 =
  25. 25.80 + 59 =
  26. 26.48 + 53 =
  27. 27.21 + 79 =
  28. 28.34 + 49 =
  29. 29.86 + 83 =
  30. 30.32 + 49 =
  31. 31.46 + 48 =
  32. 32.78 + 12 =
  33. 33.49 + 47 =
  34. 34.25 + 78 =
  35. 35.80 + 15 =
  36. 36.83 + 55 =
  37. 37.52 + 42 =
  38. 38.80 + 21 =
  39. 39.43 + 43 =
  40. 40.40 + 43 =

Answer key

  1. 136
  2. 119
  3. 122
  4. 114
  5. 115
  6. 111
  7. 92
  8. 67
  9. 86
  10. 137
  11. 75
  12. 63
  13. 128
  14. 156
  15. 90
  16. 93
  17. 80
  18. 53
  19. 104
  20. 157
  21. 141
  22. 143
  23. 123
  24. 118
  25. 139
  26. 101
  27. 100
  28. 83
  29. 169
  30. 81
  31. 94
  32. 90
  33. 96
  34. 103
  35. 95
  36. 138
  37. 94
  38. 101
  39. 86
  40. 83

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