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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 130 · 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. 1.49 + 41 =
  2. 2.43 + 25 =
  3. 3.68 + 14 =
  4. 4.35 + 77 =
  5. 5.23 + 22 =
  6. 6.29 + 54 =
  7. 7.47 + 78 =
  8. 8.24 + 32 =
  9. 9.39 + 48 =
  10. 10.53 + 54 =
  11. 11.66 + 59 =
  12. 12.71 + 53 =
  13. 13.60 + 47 =
  14. 14.61 + 37 =
  15. 15.67 + 68 =
  16. 16.25 + 39 =
  17. 17.39 + 21 =
  18. 18.30 + 59 =
  19. 19.30 + 52 =
  20. 20.60 + 45 =
  21. 21.44 + 28 =
  22. 22.67 + 77 =
  23. 23.42 + 71 =
  24. 24.41 + 75 =
  25. 25.80 + 37 =
  26. 26.29 + 43 =
  27. 27.74 + 61 =
  28. 28.64 + 61 =
  29. 29.61 + 24 =
  30. 30.60 + 42 =
  31. 31.39 + 14 =
  32. 32.72 + 23 =
  33. 33.86 + 32 =
  34. 34.53 + 26 =
  35. 35.21 + 28 =
  36. 36.31 + 69 =
  37. 37.79 + 38 =
  38. 38.43 + 14 =
  39. 39.89 + 47 =
  40. 40.51 + 15 =

Answer key

  1. 90
  2. 68
  3. 82
  4. 112
  5. 45
  6. 83
  7. 125
  8. 56
  9. 87
  10. 107
  11. 125
  12. 124
  13. 107
  14. 98
  15. 135
  16. 64
  17. 60
  18. 89
  19. 82
  20. 105
  21. 72
  22. 144
  23. 113
  24. 116
  25. 117
  26. 72
  27. 135
  28. 125
  29. 85
  30. 102
  31. 53
  32. 95
  33. 118
  34. 79
  35. 49
  36. 100
  37. 117
  38. 57
  39. 136
  40. 66

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