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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 28 · 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. 1.30 + 89 =
  2. 2.85 + 57 =
  3. 3.71 + 13 =
  4. 4.32 + 59 =
  5. 5.71 + 85 =
  6. 6.44 + 73 =
  7. 7.67 + 75 =
  8. 8.70 + 23 =
  9. 9.57 + 78 =
  10. 10.85 + 17 =
  11. 11.65 + 53 =
  12. 12.24 + 12 =
  13. 13.50 + 31 =
  14. 14.67 + 79 =
  15. 15.33 + 55 =
  16. 16.22 + 41 =
  17. 17.29 + 12 =
  18. 18.46 + 15 =
  19. 19.63 + 56 =
  20. 20.32 + 51 =
  21. 21.89 + 34 =
  22. 22.48 + 36 =
  23. 23.22 + 12 =
  24. 24.49 + 77 =
  25. 25.83 + 51 =
  26. 26.55 + 82 =
  27. 27.50 + 81 =
  28. 28.77 + 59 =
  29. 29.31 + 44 =
  30. 30.58 + 76 =
  31. 31.24 + 25 =
  32. 32.89 + 71 =
  33. 33.77 + 43 =
  34. 34.28 + 81 =
  35. 35.21 + 46 =
  36. 36.30 + 31 =
  37. 37.52 + 51 =
  38. 38.25 + 21 =
  39. 39.27 + 31 =
  40. 40.54 + 68 =

Answer key

  1. 119
  2. 142
  3. 84
  4. 91
  5. 156
  6. 117
  7. 142
  8. 93
  9. 135
  10. 102
  11. 118
  12. 36
  13. 81
  14. 146
  15. 88
  16. 63
  17. 41
  18. 61
  19. 119
  20. 83
  21. 123
  22. 84
  23. 34
  24. 126
  25. 134
  26. 137
  27. 131
  28. 136
  29. 75
  30. 134
  31. 49
  32. 160
  33. 120
  34. 109
  35. 67
  36. 61
  37. 103
  38. 46
  39. 58
  40. 122

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