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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 370 · 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. 1.26 + 13 =
  2. 2.66 + 81 =
  3. 3.54 + 15 =
  4. 4.75 + 81 =
  5. 5.87 + 61 =
  6. 6.62 + 14 =
  7. 7.22 + 65 =
  8. 8.73 + 43 =
  9. 9.51 + 51 =
  10. 10.37 + 34 =
  11. 11.45 + 87 =
  12. 12.75 + 49 =
  13. 13.40 + 14 =
  14. 14.37 + 25 =
  15. 15.42 + 19 =
  16. 16.84 + 31 =
  17. 17.62 + 41 =
  18. 18.55 + 73 =
  19. 19.78 + 24 =
  20. 20.56 + 68 =
  21. 21.48 + 21 =
  22. 22.29 + 87 =
  23. 23.79 + 71 =
  24. 24.83 + 43 =
  25. 25.33 + 55 =
  26. 26.49 + 55 =
  27. 27.32 + 76 =
  28. 28.58 + 85 =
  29. 29.52 + 22 =
  30. 30.45 + 81 =
  31. 31.87 + 67 =
  32. 32.29 + 79 =
  33. 33.31 + 15 =
  34. 34.70 + 31 =
  35. 35.46 + 43 =
  36. 36.37 + 52 =
  37. 37.41 + 48 =
  38. 38.81 + 41 =
  39. 39.31 + 33 =
  40. 40.64 + 12 =

Answer key

  1. 39
  2. 147
  3. 69
  4. 156
  5. 148
  6. 76
  7. 87
  8. 116
  9. 102
  10. 71
  11. 132
  12. 124
  13. 54
  14. 62
  15. 61
  16. 115
  17. 103
  18. 128
  19. 102
  20. 124
  21. 69
  22. 116
  23. 150
  24. 126
  25. 88
  26. 104
  27. 108
  28. 143
  29. 74
  30. 126
  31. 154
  32. 108
  33. 46
  34. 101
  35. 89
  36. 89
  37. 89
  38. 122
  39. 64
  40. 76

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