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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 121 · 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. 1.63 + 29 =
  2. 2.28 + 32 =
  3. 3.75 + 79 =
  4. 4.57 + 79 =
  5. 5.23 + 85 =
  6. 6.35 + 57 =
  7. 7.55 + 21 =
  8. 8.52 + 73 =
  9. 9.58 + 27 =
  10. 10.22 + 39 =
  11. 11.33 + 28 =
  12. 12.29 + 18 =
  13. 13.84 + 41 =
  14. 14.62 + 67 =
  15. 15.54 + 78 =
  16. 16.25 + 84 =
  17. 17.64 + 28 =
  18. 18.68 + 48 =
  19. 19.34 + 73 =
  20. 20.65 + 46 =
  21. 21.89 + 65 =
  22. 22.63 + 71 =
  23. 23.83 + 66 =
  24. 24.36 + 66 =
  25. 25.27 + 22 =
  26. 26.33 + 68 =
  27. 27.58 + 63 =
  28. 28.55 + 45 =
  29. 29.40 + 88 =
  30. 30.58 + 29 =
  31. 31.79 + 81 =
  32. 32.64 + 73 =
  33. 33.64 + 51 =
  34. 34.35 + 34 =
  35. 35.23 + 34 =
  36. 36.42 + 27 =
  37. 37.40 + 53 =
  38. 38.65 + 23 =
  39. 39.54 + 25 =
  40. 40.36 + 31 =

Answer key

  1. 92
  2. 60
  3. 154
  4. 136
  5. 108
  6. 92
  7. 76
  8. 125
  9. 85
  10. 61
  11. 61
  12. 47
  13. 125
  14. 129
  15. 132
  16. 109
  17. 92
  18. 116
  19. 107
  20. 111
  21. 154
  22. 134
  23. 149
  24. 102
  25. 49
  26. 101
  27. 121
  28. 100
  29. 128
  30. 87
  31. 160
  32. 137
  33. 115
  34. 69
  35. 57
  36. 69
  37. 93
  38. 88
  39. 79
  40. 67

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