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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 156 · 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. 1.31 + 19 =
  2. 2.50 + 12 =
  3. 3.46 + 88 =
  4. 4.23 + 55 =
  5. 5.68 + 34 =
  6. 6.53 + 64 =
  7. 7.69 + 81 =
  8. 8.62 + 48 =
  9. 9.48 + 62 =
  10. 10.29 + 25 =
  11. 11.82 + 65 =
  12. 12.42 + 79 =
  13. 13.83 + 26 =
  14. 14.49 + 23 =
  15. 15.74 + 32 =
  16. 16.26 + 27 =
  17. 17.89 + 48 =
  18. 18.38 + 89 =
  19. 19.27 + 47 =
  20. 20.88 + 41 =
  21. 21.32 + 62 =
  22. 22.64 + 41 =
  23. 23.78 + 42 =
  24. 24.82 + 48 =
  25. 25.73 + 16 =
  26. 26.25 + 25 =
  27. 27.42 + 27 =
  28. 28.74 + 18 =
  29. 29.25 + 32 =
  30. 30.24 + 47 =
  31. 31.48 + 52 =
  32. 32.52 + 43 =
  33. 33.89 + 89 =
  34. 34.71 + 73 =
  35. 35.31 + 31 =
  36. 36.31 + 13 =
  37. 37.49 + 85 =
  38. 38.34 + 55 =
  39. 39.57 + 61 =
  40. 40.72 + 46 =

Answer key

  1. 50
  2. 62
  3. 134
  4. 78
  5. 102
  6. 117
  7. 150
  8. 110
  9. 110
  10. 54
  11. 147
  12. 121
  13. 109
  14. 72
  15. 106
  16. 53
  17. 137
  18. 127
  19. 74
  20. 129
  21. 94
  22. 105
  23. 120
  24. 130
  25. 89
  26. 50
  27. 69
  28. 92
  29. 57
  30. 71
  31. 100
  32. 95
  33. 178
  34. 144
  35. 62
  36. 44
  37. 134
  38. 89
  39. 118
  40. 118

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