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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 765 · 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. 1.83 + 73 =
  2. 2.71 + 52 =
  3. 3.80 + 84 =
  4. 4.88 + 85 =
  5. 5.29 + 69 =
  6. 6.83 + 22 =
  7. 7.81 + 19 =
  8. 8.21 + 21 =
  9. 9.69 + 72 =
  10. 10.53 + 75 =
  11. 11.58 + 79 =
  12. 12.44 + 24 =
  13. 13.25 + 31 =
  14. 14.62 + 69 =
  15. 15.69 + 82 =
  16. 16.43 + 33 =
  17. 17.35 + 41 =
  18. 18.32 + 62 =
  19. 19.70 + 55 =
  20. 20.73 + 33 =
  21. 21.75 + 46 =
  22. 22.29 + 33 =
  23. 23.56 + 23 =
  24. 24.23 + 42 =
  25. 25.63 + 22 =
  26. 26.49 + 68 =
  27. 27.26 + 51 =
  28. 28.25 + 14 =
  29. 29.60 + 31 =
  30. 30.84 + 71 =
  31. 31.34 + 61 =
  32. 32.71 + 53 =
  33. 33.23 + 44 =
  34. 34.37 + 25 =
  35. 35.61 + 63 =
  36. 36.33 + 81 =
  37. 37.64 + 49 =
  38. 38.71 + 61 =
  39. 39.43 + 31 =
  40. 40.44 + 14 =

Answer key

  1. 156
  2. 123
  3. 164
  4. 173
  5. 98
  6. 105
  7. 100
  8. 42
  9. 141
  10. 128
  11. 137
  12. 68
  13. 56
  14. 131
  15. 151
  16. 76
  17. 76
  18. 94
  19. 125
  20. 106
  21. 121
  22. 62
  23. 79
  24. 65
  25. 85
  26. 117
  27. 77
  28. 39
  29. 91
  30. 155
  31. 95
  32. 124
  33. 67
  34. 62
  35. 124
  36. 114
  37. 113
  38. 132
  39. 74
  40. 58

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