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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 113 · 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. 1.70 + 74 =
  2. 2.51 + 33 =
  3. 3.38 + 29 =
  4. 4.52 + 19 =
  5. 5.43 + 61 =
  6. 6.29 + 76 =
  7. 7.84 + 51 =
  8. 8.80 + 67 =
  9. 9.24 + 81 =
  10. 10.88 + 23 =
  11. 11.21 + 14 =
  12. 12.36 + 22 =
  13. 13.49 + 38 =
  14. 14.89 + 24 =
  15. 15.89 + 84 =
  16. 16.41 + 23 =
  17. 17.46 + 31 =
  18. 18.27 + 25 =
  19. 19.40 + 12 =
  20. 20.33 + 59 =
  21. 21.80 + 87 =
  22. 22.83 + 21 =
  23. 23.29 + 41 =
  24. 24.69 + 42 =
  25. 25.84 + 73 =
  26. 26.41 + 71 =
  27. 27.37 + 85 =
  28. 28.36 + 12 =
  29. 29.28 + 32 =
  30. 30.62 + 45 =
  31. 31.23 + 31 =
  32. 32.35 + 38 =
  33. 33.85 + 73 =
  34. 34.76 + 35 =
  35. 35.85 + 18 =
  36. 36.65 + 26 =
  37. 37.56 + 45 =
  38. 38.42 + 71 =
  39. 39.21 + 21 =
  40. 40.69 + 37 =

Answer key

  1. 144
  2. 84
  3. 67
  4. 71
  5. 104
  6. 105
  7. 135
  8. 147
  9. 105
  10. 111
  11. 35
  12. 58
  13. 87
  14. 113
  15. 173
  16. 64
  17. 77
  18. 52
  19. 52
  20. 92
  21. 167
  22. 104
  23. 70
  24. 111
  25. 157
  26. 112
  27. 122
  28. 48
  29. 60
  30. 107
  31. 54
  32. 73
  33. 158
  34. 111
  35. 103
  36. 91
  37. 101
  38. 113
  39. 42
  40. 106

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