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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 330 · 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. 1.38 + 39 =
  2. 2.61 + 26 =
  3. 3.60 + 83 =
  4. 4.35 + 28 =
  5. 5.66 + 79 =
  6. 6.48 + 27 =
  7. 7.29 + 16 =
  8. 8.71 + 68 =
  9. 9.73 + 17 =
  10. 10.88 + 16 =
  11. 11.87 + 75 =
  12. 12.27 + 67 =
  13. 13.22 + 27 =
  14. 14.88 + 49 =
  15. 15.47 + 61 =
  16. 16.77 + 86 =
  17. 17.54 + 12 =
  18. 18.44 + 37 =
  19. 19.34 + 68 =
  20. 20.79 + 75 =
  21. 21.49 + 56 =
  22. 22.72 + 81 =
  23. 23.36 + 81 =
  24. 24.72 + 41 =
  25. 25.63 + 71 =
  26. 26.30 + 31 =
  27. 27.27 + 29 =
  28. 28.35 + 68 =
  29. 29.56 + 56 =
  30. 30.44 + 23 =
  31. 31.22 + 12 =
  32. 32.45 + 34 =
  33. 33.27 + 35 =
  34. 34.21 + 75 =
  35. 35.67 + 42 =
  36. 36.63 + 19 =
  37. 37.41 + 87 =
  38. 38.31 + 46 =
  39. 39.24 + 71 =
  40. 40.88 + 62 =

Answer key

  1. 77
  2. 87
  3. 143
  4. 63
  5. 145
  6. 75
  7. 45
  8. 139
  9. 90
  10. 104
  11. 162
  12. 94
  13. 49
  14. 137
  15. 108
  16. 163
  17. 66
  18. 81
  19. 102
  20. 154
  21. 105
  22. 153
  23. 117
  24. 113
  25. 134
  26. 61
  27. 56
  28. 103
  29. 112
  30. 67
  31. 34
  32. 79
  33. 62
  34. 96
  35. 109
  36. 82
  37. 128
  38. 77
  39. 95
  40. 150

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