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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 290 · 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. 1.36 + 85 =
  2. 2.59 + 66 =
  3. 3.74 + 16 =
  4. 4.80 + 35 =
  5. 5.40 + 44 =
  6. 6.80 + 38 =
  7. 7.64 + 71 =
  8. 8.25 + 34 =
  9. 9.35 + 16 =
  10. 10.81 + 63 =
  11. 11.41 + 67 =
  12. 12.22 + 71 =
  13. 13.70 + 45 =
  14. 14.71 + 16 =
  15. 15.49 + 78 =
  16. 16.26 + 28 =
  17. 17.70 + 15 =
  18. 18.55 + 48 =
  19. 19.48 + 23 =
  20. 20.85 + 46 =
  21. 21.26 + 82 =
  22. 22.65 + 61 =
  23. 23.57 + 67 =
  24. 24.55 + 24 =
  25. 25.74 + 49 =
  26. 26.71 + 42 =
  27. 27.35 + 41 =
  28. 28.66 + 85 =
  29. 29.85 + 12 =
  30. 30.75 + 14 =
  31. 31.87 + 77 =
  32. 32.42 + 32 =
  33. 33.49 + 79 =
  34. 34.85 + 31 =
  35. 35.64 + 51 =
  36. 36.54 + 86 =
  37. 37.87 + 28 =
  38. 38.54 + 81 =
  39. 39.87 + 45 =
  40. 40.36 + 76 =

Answer key

  1. 121
  2. 125
  3. 90
  4. 115
  5. 84
  6. 118
  7. 135
  8. 59
  9. 51
  10. 144
  11. 108
  12. 93
  13. 115
  14. 87
  15. 127
  16. 54
  17. 85
  18. 103
  19. 71
  20. 131
  21. 108
  22. 126
  23. 124
  24. 79
  25. 123
  26. 113
  27. 76
  28. 151
  29. 97
  30. 89
  31. 164
  32. 74
  33. 128
  34. 116
  35. 115
  36. 140
  37. 115
  38. 135
  39. 132
  40. 112

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