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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 204 · 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. 1.89 + 71 =
  2. 2.47 + 17 =
  3. 3.53 + 34 =
  4. 4.46 + 23 =
  5. 5.87 + 71 =
  6. 6.76 + 84 =
  7. 7.70 + 87 =
  8. 8.40 + 28 =
  9. 9.88 + 77 =
  10. 10.30 + 72 =
  11. 11.23 + 71 =
  12. 12.66 + 36 =
  13. 13.43 + 71 =
  14. 14.74 + 51 =
  15. 15.77 + 51 =
  16. 16.55 + 86 =
  17. 17.75 + 78 =
  18. 18.49 + 79 =
  19. 19.58 + 16 =
  20. 20.35 + 83 =
  21. 21.40 + 56 =
  22. 22.57 + 28 =
  23. 23.67 + 21 =
  24. 24.43 + 31 =
  25. 25.46 + 58 =
  26. 26.48 + 31 =
  27. 27.50 + 29 =
  28. 28.29 + 63 =
  29. 29.42 + 82 =
  30. 30.75 + 39 =
  31. 31.65 + 29 =
  32. 32.48 + 42 =
  33. 33.58 + 38 =
  34. 34.74 + 68 =
  35. 35.82 + 12 =
  36. 36.56 + 59 =
  37. 37.39 + 61 =
  38. 38.80 + 85 =
  39. 39.64 + 61 =
  40. 40.88 + 36 =

Answer key

  1. 160
  2. 64
  3. 87
  4. 69
  5. 158
  6. 160
  7. 157
  8. 68
  9. 165
  10. 102
  11. 94
  12. 102
  13. 114
  14. 125
  15. 128
  16. 141
  17. 153
  18. 128
  19. 74
  20. 118
  21. 96
  22. 85
  23. 88
  24. 74
  25. 104
  26. 79
  27. 79
  28. 92
  29. 124
  30. 114
  31. 94
  32. 90
  33. 96
  34. 142
  35. 94
  36. 115
  37. 100
  38. 165
  39. 125
  40. 124

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