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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 159 · 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. 1.68 + 41 =
  2. 2.65 + 28 =
  3. 3.87 + 61 =
  4. 4.48 + 69 =
  5. 5.51 + 64 =
  6. 6.48 + 16 =
  7. 7.72 + 18 =
  8. 8.35 + 21 =
  9. 9.24 + 14 =
  10. 10.74 + 21 =
  11. 11.34 + 12 =
  12. 12.31 + 13 =
  13. 13.50 + 58 =
  14. 14.54 + 35 =
  15. 15.25 + 27 =
  16. 16.89 + 75 =
  17. 17.24 + 41 =
  18. 18.55 + 52 =
  19. 19.48 + 64 =
  20. 20.74 + 56 =
  21. 21.81 + 53 =
  22. 22.89 + 24 =
  23. 23.56 + 66 =
  24. 24.49 + 39 =
  25. 25.64 + 51 =
  26. 26.25 + 36 =
  27. 27.25 + 59 =
  28. 28.61 + 89 =
  29. 29.23 + 22 =
  30. 30.83 + 35 =
  31. 31.82 + 69 =
  32. 32.40 + 27 =
  33. 33.64 + 72 =
  34. 34.73 + 19 =
  35. 35.83 + 16 =
  36. 36.24 + 24 =
  37. 37.84 + 31 =
  38. 38.26 + 23 =
  39. 39.82 + 81 =
  40. 40.30 + 18 =

Answer key

  1. 109
  2. 93
  3. 148
  4. 117
  5. 115
  6. 64
  7. 90
  8. 56
  9. 38
  10. 95
  11. 46
  12. 44
  13. 108
  14. 89
  15. 52
  16. 164
  17. 65
  18. 107
  19. 112
  20. 130
  21. 134
  22. 113
  23. 122
  24. 88
  25. 115
  26. 61
  27. 84
  28. 150
  29. 45
  30. 118
  31. 151
  32. 67
  33. 136
  34. 92
  35. 99
  36. 48
  37. 115
  38. 49
  39. 163
  40. 48

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