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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 35 · 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. 1.35 + 78 =
  2. 2.61 + 32 =
  3. 3.80 + 39 =
  4. 4.37 + 23 =
  5. 5.36 + 31 =
  6. 6.73 + 33 =
  7. 7.77 + 63 =
  8. 8.60 + 81 =
  9. 9.55 + 57 =
  10. 10.64 + 84 =
  11. 11.50 + 75 =
  12. 12.67 + 48 =
  13. 13.65 + 61 =
  14. 14.87 + 67 =
  15. 15.67 + 28 =
  16. 16.37 + 46 =
  17. 17.83 + 31 =
  18. 18.40 + 69 =
  19. 19.71 + 14 =
  20. 20.62 + 83 =
  21. 21.68 + 48 =
  22. 22.48 + 67 =
  23. 23.44 + 14 =
  24. 24.45 + 14 =
  25. 25.88 + 82 =
  26. 26.68 + 79 =
  27. 27.68 + 23 =
  28. 28.89 + 29 =
  29. 29.55 + 31 =
  30. 30.32 + 81 =
  31. 31.63 + 78 =
  32. 32.28 + 35 =
  33. 33.34 + 31 =
  34. 34.50 + 58 =
  35. 35.25 + 41 =
  36. 36.73 + 61 =
  37. 37.85 + 51 =
  38. 38.29 + 85 =
  39. 39.50 + 28 =
  40. 40.49 + 76 =

Answer key

  1. 113
  2. 93
  3. 119
  4. 60
  5. 67
  6. 106
  7. 140
  8. 141
  9. 112
  10. 148
  11. 125
  12. 115
  13. 126
  14. 154
  15. 95
  16. 83
  17. 114
  18. 109
  19. 85
  20. 145
  21. 116
  22. 115
  23. 58
  24. 59
  25. 170
  26. 147
  27. 91
  28. 118
  29. 86
  30. 113
  31. 141
  32. 63
  33. 65
  34. 108
  35. 66
  36. 134
  37. 136
  38. 114
  39. 78
  40. 125

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