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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 74 · 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. 1.72 + 75 =
  2. 2.73 + 13 =
  3. 3.79 + 36 =
  4. 4.43 + 66 =
  5. 5.36 + 88 =
  6. 6.88 + 22 =
  7. 7.66 + 13 =
  8. 8.25 + 14 =
  9. 9.72 + 81 =
  10. 10.21 + 67 =
  11. 11.53 + 52 =
  12. 12.27 + 36 =
  13. 13.74 + 34 =
  14. 14.75 + 25 =
  15. 15.30 + 83 =
  16. 16.67 + 68 =
  17. 17.23 + 16 =
  18. 18.46 + 75 =
  19. 19.24 + 23 =
  20. 20.75 + 51 =
  21. 21.34 + 21 =
  22. 22.21 + 61 =
  23. 23.37 + 18 =
  24. 24.45 + 85 =
  25. 25.33 + 25 =
  26. 26.52 + 18 =
  27. 27.88 + 87 =
  28. 28.83 + 35 =
  29. 29.74 + 21 =
  30. 30.53 + 84 =
  31. 31.57 + 48 =
  32. 32.85 + 31 =
  33. 33.70 + 32 =
  34. 34.24 + 21 =
  35. 35.36 + 53 =
  36. 36.25 + 32 =
  37. 37.37 + 22 =
  38. 38.89 + 67 =
  39. 39.84 + 16 =
  40. 40.43 + 84 =

Answer key

  1. 147
  2. 86
  3. 115
  4. 109
  5. 124
  6. 110
  7. 79
  8. 39
  9. 153
  10. 88
  11. 105
  12. 63
  13. 108
  14. 100
  15. 113
  16. 135
  17. 39
  18. 121
  19. 47
  20. 126
  21. 55
  22. 82
  23. 55
  24. 130
  25. 58
  26. 70
  27. 175
  28. 118
  29. 95
  30. 137
  31. 105
  32. 116
  33. 102
  34. 45
  35. 89
  36. 57
  37. 59
  38. 156
  39. 100
  40. 127

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